This story was updated with information about an arrest in one incident and a suspect identification in the other.

Eastern Michigan University police are investigating two reported rapes in a university residence hall made over the weekend.

The EMU First Year Center, of which Putnam Residence Hall is a part.

According to the university’s

crime summary

, the first incident took place at 4 a.m. Saturday in the Putnam Residence Hall. The crime wasn’t reported until 8:57 p.m. Sunday, according to the summary.

The woman told police she was raped by an acquaintance in the residence hall.

EMU spokesman Geoff Larcom said one arrest has been made. In the Saturday case, police identified and arrested the EMU student who was an acquaintance of the victim.

“That student has been arrested … and is lodged in the county jail,” Larcom said.

The second incident took place at 3 a.m. Sunday and was also in the Putnam Residence Hall. According to police, the woman came forward to report the crime at 8:56 p.m. Sunday.

Police said the suspect in the case forced sexual intercourse with the woman.

Police have identified a suspect in that incident as well, Larcom said. The man is an Ohio resident and not an EMU student. Larcom said the man was visiting a relative at EMU and has since returned to Ohio.

“We are seeking to interview him,” Larcom said.

The crime summary listed both incidents as ongoing investigations. Both incidents are being investigated as first-degree criminal sexual conduct.

The sexual assault reports come on the heels of a tough weekend around EMU’s campus.

On Friday, EMU student and football player Demarius Reed was found dead of multiple gunshots in an off-campus apartment. Police are investigating Reed's death as a homicide and continue to investigate the incidents.

Two EMU students reported being assaulted, and one robbed, by a group of between four and six men in a gray or silver van. One assault took place about 2:20 a.m. Saturday and the second incident took place almost exactly 24 hours later. The incidents sent the two EMU students to the hospital, where they were treated for their injuries.

Ypsilanti police continue to investigate those incidents and are looking for possible connections.

Kyle Feldscher covers cops and courts for The Ann Arbor News. He can be reached at kylefeldscher@mlive.com or you can follow him on Twitter. Find all Washtenaw County crime stories here.