A Salt Lake County woman who opened her apartment door expecting her boyfriend was raped Wednesday night, according to a sheriff's report.

The 28-year-old woman told police she had just returned from dropping off her children at her ex-husband's residence when she heard a knock at the door and opened it, according to the report released Friday.A white male in his 30s, wearing a black mask and dark clothing walked inside the apartment, about 61st South and 21st East, and produced a survival knife. Detectives said the man sexually assaulted the woman and verbally abused her during the attack.