Westbrook police say they have arrested three males in connection with a sexual assault on a teenage girl Sunday morning in a room at the Super 8 Motel.

Capt. Steven Goldberg said an investigation by detectives began after police received a report about 8 a.m. of suspicious activity at the motel, at 208 Larrabee Road.

Detectives determined that the 16-year-old girl had been sexually assaulted in a motel room by three males.

Two of the suspects are juveniles, ages 15 and 16. The third was identified by police as Garang Majok, 19, of Lewiston. All three have been charged with gross sexual assault, a Class A felony.

The juveniles were taken to the Long Creek Youth Development Center in South Portland. Majok made his initial court appearance on Monday. He was being held Monday night in the Cumberland County Jail, where bail was set at $25,000 cash, according to a jail intake worker.

Westbrook police made the media aware on Sunday that they were investigating a suspicious incident at the motel, but provided no details.

In a press release issued Monday, Goldberg said he had been unable to release any details about the incident earlier because of the ongoing investigation. He said the premature release of information could have jeopardized the department’s investigation.

“It should be noted that while officers were investigating the sexual assault, an unrelated, unattended death was reported to officers in a different room at the Super 8 Motel. The investigation into that death found that it was not related to the sexual assault investigation,” Goldberg said.

Goldberg said the death is not considered suspicious.