BALTIMORE (AP) _ A man who jumped into a river in a failed attempt to flee from federal drug agents succeeded on his second try when he sneaked out of a hospital where he was being held under police guard.

Carlos Calvo, 32, a Bolivian, remained at large Monday after fleeing from his room Saturday morning, barefoot and dressed only in a hospital gown and dark coat.

When a nurse entered Calvo's room to change his bedding, closing the curtain around the suspect's bed, Officer Raymond Fabian had stepped away to use the bathroom, police said.

After the nurse left and the officer returned to the room, Fabian noticed the curtain was still drawn. He pulled back the curtain and discovered that Calvo had escaped.

Federal agents arrested Calvo last Wednesday night after he and three others allegedly sold several ounces of cocaine to undercover officers.

Calvo fled ran off during the arrest and with three officers chasing him, he jumped into the Middle Branch of the Patapsco River. The officers jumped in after him and pulled the non-swimmer to shore.

The suspect had been taken to University Hospital for treatment of hypothermia, two broken ribs and a mild kidney infection.