Long Beach police are investigating a shooting that left one man dead near the Los Angeles River just off the 405 Freeway Monday afternoon, according to authorities.

Officers were dispatched to a homeless encampment at 2:25 p.m. following reports of a shooting there, according to an LBPD press release. There, police found an unresponsive man who’d been shot multiple times, according to the LBPD.

Officers tried to resuscitate the man until firefighters arrived but he was pronounced dead at the scene, police said.

The victim was a resident of the encampment, according to the release. Authorities haven’t publicly identified him.

The suspect fled the scene prior to police arrival, police said. No weapons were found and the motive for the shooting remains under investigation.

Police asked anyone with information to contact Detectives Adrian Garcia or Sean Magee at 562-570-7244. Anonymous tips may be submitted by calling 800-222-TIPS or visiting LACrimeStoppers.org.