Three people have been arrested for the shooting death of a 33-year-old man in Long Beach last week, and they may be tied to other crimes as well, police said Sunday.

The suspects are Juan Lopez, 20, of Long Beach, arrested near his residence in the 1400 block of Cedar Avenue and booked on a murder charge; Brandon Garcia, 23, of Hawaiian Gardens, arrested outside his residence in the 1200 block of 216th Street and booked on murder and attempted murder charges; and Richard Frias, 20, of Long Beach, arrested outside his residence in the 1500 block of Stanton Place and booked on a murder charge and a charge of possession of methamphetamine with intent to sell, according to police.

The arrests came between July 3 and July 5, and the suspects were each being held at the Long Beach jail on $2 million bail, police said.

Soktear Phuy—the man they’re accused of killing—died in a shooting in Central Long Beach on June 29. Responding officers found Phuy around 7:40 p.m. lying in an apartment building courtyard in the 1400 block of Rose Avenue, according to police. He had gunshot wounds to his chest, authorities said. Paramedics took him to a hospital, where he died.

“The exact motive for the shooting is currently unknown,” police said in a statement. “However, the incident is being investigated as gang-related.”

The arrests comes as Long Beach saw a surge of shootings and killings recently.

In recent months, there have been several shootings similar to the one that killed Phuy, according to police, and investigators believe they may involve many of the same suspects.

Anyone with information on the case was urged to call police at 562-570-7244, or Crime Stoppers at 800-222-TIPS.