<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2012-09-26</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001261166</issuerCik>
        <issuerName>NEUBERGER BERMAN REAL ESTATE SECURITIES INCOME FUND INC</issuerName>
        <issuerTradingSymbol>NRO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000779955</rptOwnerCik>
            <rptOwnerName>SUN LIFE INSURANCE &amp; ANNUITY CO OF NEW YORK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE GRAND CENTRAL PLACE</rptOwnerStreet1>
            <rptOwnerStreet2>60 EAST 42ND STREET, SUITE 1115</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10165</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000745544</rptOwnerCik>
            <rptOwnerName>Sun Life Assurance Co of Canada (U.S.)</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE SUN LIFE EXECUTIVE PARK, SC 1303</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WELLESLEY HILLS</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02481</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001097362</rptOwnerCik>
            <rptOwnerName>SUN LIFE FINANCIAL INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>150 KING STREET WEST SUITE 1400</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TORONTO</rptOwnerCity>
            <rptOwnerState>A6</rptOwnerState>
            <rptOwnerZipCode>M5H 1J9</rptOwnerZipCode>
            <rptOwnerStateDescription>ONTARIO, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>4.00% Mandatory Redeemable Preferred Shares due 9/14/2017</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>520</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>4.00% Mandatory Redeemable Preferred Shares due 9/14/2017</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>520</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Sun Life Assurance Company of Canada (U.S.) owns all of the common stock of Sun Life Insurance and</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>4.00% Mandatory Redeemable Preferred Shares due 9/14/2017</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>520</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Sun Life Financial Inc. indirectly owns all of the outstanding common stock of</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Annuity Company of New York, which owns the securities indicated.</footnote>
        <footnote id="F2">Sun Life Insurance and Annuity Company of New York which owns the securities indicated,through a series of holding companies. Sun Life Financial Inc. owns all of the common stock of Sun Life Global Investments Inc., which owns all of the common stock of Sun Life Assurance Company of Canada-U.S. Operations Holdings, Inc., which owns all of the common stock of Sun Life Financial (U.S.) Holdings, Inc.,which owns all of the membership interests of Sun Life Financial (U.S.) Investments LLC, which owns all of the common stock of Sun Life of Canada (U.S.) Holdings, Inc., which owns all of the common stock of Sun Life Assurance Company of Canada (U.S.),an operating company which owns all of the common stock of Sun Life Insurance and Annuity Company of New York, which owns the securities indicated.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John T. Donnelly, Senior Managing Director, Investments Strategic Research and Initiatives, on behalf of Sun Life Assurance Company of Canada (U.S.) and Sun Life Insurance and Annuity Company of New York</signatureName>
        <signatureDate>2012-09-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ann C. King, Authorized Signer on behalf of Sun Life Assurance Company of Canada (U.S.) and Sun Life Insurance and Annuity Company of New York</signatureName>
        <signatureDate>2012-09-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Stephen Peacher, Authorized Signer on behalf of Sun Life Financial Inc.</signatureName>
        <signatureDate>2012-09-27</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Angelo Manioudakis, Authorized Signer on behalf of Sun Life Financial Inc.</signatureName>
        <signatureDate>2012-09-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
