By Mark Abrams

PHILADELPHIA (CBS) — Philadelphia police say a “person of interest” has been taken into custody and is being questioned in connection with a home invasion-robbery-sexual assault in Chestnut Hill over the weekend.

Investigators from the Special Victims Unit are handling the case and conducting the questioning.

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Police declined to further identify the person or say when he was brought in.

Authorities say the incident happened in the first block of East Chestnut Hill Avenue about 4 a.m. Saturday.

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Police say an armed man broke into the home, startled a husband and wife in their bedroom, and then held a gun to the head of the husband while he sexually assaulted the woman.

Investigators say when the man put down the gun for a moment, the wife picked it up and pointed it at him and tried to shoot but the weapon didn’t fire.

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The intruder then ran out of the home, but took the couple’s wallets and cell phones and drove off in their new car.