A 20-year-old man who lived in Boston was indicted Tuesday for allegedly raping a Boston University student in her dorm in October, prosecutors said.

Samson Donick, who did not attend BU and is now a resident of Tiburon, Calif., is expected to be arraigned in Suffolk Superior Court Wednesday on charges of aggravated rape, breaking and entering at night with the intent to commit a felony, burglary, and indecent assault and battery, according to Suffolk District Attorney Daniel F. Conley’s office. Donick is a former MIT student.

Prosecutors believe the rape occurred during the early morning hours on Oct. 18. Donick and three other males were signed into the Student Village II dorm at 33 Harry Agganis Way by three female students at about 2 a.m., Conley’s office said in a statement.

They initially went to the females’ suite, prosecutors allege.

At 2:30 a.m., Donick and one of the males left the suite, searching for a female student. The person they were looking for was not the same as the eventual victim, Conley’s office said.

“For approximately 30 minutes, Donick and the second male entered about 10 different dorm rooms on four different floors while looking for her,’’ the statement said. Numerous students later reported that two unknown males had entered their rooms that morning.

While they were searching, prosecutors said, Donick entered the victim’s room. They did not know each other, Conley’s office said.

“The 20-year-old victim . . . awoke to find Donick in her room sexually assaulting her,’’ the statement said. “She confronted him and screamed, and he fled the scene.’’

BU police saw the men on surveillance cameras and accessed their identification at the dorm’s front desk, where they signed in.

J.D. Capelouto can be reached at jd.capelouto@globe.com. Follow him on Twitter @jdcapelouto.