Getty Images

San Francisco 49ers wide receiver Michael Crabtree is being investigated over allegations that he sexually assaulted a woman last week, according to multiple media reports.

The San Francisco Chronicle reports that police have interviewed Crabtree about allegations that he sexually assaulted a woman in a San Francisco hotel early on January 13, hours after the 49ers beat the Packers at Candlestick Park.

Bay Area television station KTVU reports that San Francisco Police have confirmed the investigation, and that Crabtree is cooperating with the Special Victims Unit, whose detectives interviewed Crabtree.

Crabtree has not been arrested or charged. He is still expected to play on Sunday against the Falcons in Atlanta.