A woman was sexually assaulted in the District on Sunday morning after someone came to her door asking to use the telephone, D.C. police said.

They said the woman answered a knock on her door about 3:45 a.m. in a neighborhood near Rhode Island Avenue and North Capitol Street to find someone who asked to use the phone. After he went inside, she was attacked, police said.

They said the assailant was described as a black male, 5 feet 8 to 5 feet 10, with a dark complexion and short hair, with no facial hair. He was last seen wearing a black T-shirt, and khaki pants, police said.