Two people died in North Long Beach on Monday morning, leading to an apparent standoff between Long Beach SWAT officers and a suspected gunman.

The series of events began at 11:15 a.m., when Long Beach police responded to a reported shooting on the 300 block of East 63rd Street.

Upon arriving, they discovered a woman with gunshot wounds to the upper body and a man with unknown injuries, the department said in a statement. The Long Beach Fire Department transported the woman to a hospital, where she was pronounced dead; the man was pronounced dead at the scene.

The victims’ identities have not been released.

A possible male suspect fled the scene to a nearby building, where officers established a perimeter and attempted to contact him, according to the statement. SWAT officers were called in to help, and they were on scene as of 3:30 p.m.

The police had released no further information about the incident as of Monday afternoon.

The motive for the shooting is unknown, and an investigation is ongoing.