Authorities in Illinois have identified a suspect following a fatal shooting on a private bus early Saturday morning.

According to WIFR, police believe 22-year-old Raheem King was aboard the charter bus and armed with a rifle when he opened fire on three passengers, killing them.

An initial police statement indicated the suspect was among the passengers, as reported by WLS.

The shooting reportedly occurred at about 3:30 a.m. as the bus traveled between Auburn Street and Johnston Avenue.

The uninjured passengers exited the bus at that time and the gunman also got away. After driving to Springfield Avenue, the bus driver called police.

Reports indicate the limousine-style vehicle had been rented Friday for a private event.

As Fox News reported, the bus was operated by Distinguished Gentleman, an “adult-themed” entertainment firm.

Following an initial investigation, police announced an arrest warrant for King had been obtained. Reports indicate he is expected to face charges including four counts of first-degree murder.

Authorities warn anyone who might come in contact with King that he should be treated as armed and potentially dangerous. He is believed to still be in possession of the rifle used in the shooting.

As the Chicago Tribune reported, Winnebago County Sheriff Bill Hintz said the victims’ names will likely be released Monday.

Rockford police are urging anyone with information about the crime or King’s whereabouts to call 815-966-2900 or leave a tip with Crime Stoppers by dialing 815-963-7867.

[Featured image: Raheem King/Rockford Police Department]