Butler police say a man and woman found dead early Thursday morning inside an apartment on North McKean Street likely died of drug overdoses.

The deaths bring to three the number of apparent fatal overdoses in the city since Monday.

Autopsies were planned today for the latest victims — Patrick J. Pickering, 37, of Butler and his friend Christina M. Cloherty, 40, who has no known address.

The pair died at the apartment of Pickering's younger brother in the 400 block of North McKean Street, said Butler police Deputy Chief David Adam.

The brother told police that he last saw the victims alive about 9 p.m. Wednesday when he and his wife left the home. When he returned, he found them on the floor in a bedroom scattered with drug paraphernalia.

On Monday, city police and emergency responders discovered the body of 23-year-old Kourtney D. Grey in her one-room Highland Avenue apartment. A 911 call alerted authorities of the death about 10:15 p.m.

Adam said all three suspected overdoses remain under investigation.