Police are working to determine the cause of death of a man in his 40s whose body was found floating in a shallow creek in Rockville on Wednesday night.

Montgomery County police spokeswoman Lucille Bauer said Thursday that the man was drinking alcohol and playing soccer with friends at about 5 p.m. Wednesday. Within two hours, he apparently vanished. One of the friends found him face-down in some water on the 12800 block of Veirs Mill Road shortly after 7 p.m. The water was said to be only a few feet deep.