Eight people were shot at a San Bernardino, California apartment complex, including a 17-year-old boy who was in critical condition, police said on Monday, Reuters reported.

Police in the Southern California city were unsure what motivated the shooting late on Sunday in an outdoor common area where a group of people had gathered, said San Bernardino police spokesman Captain Richard Lawhead.

“Right now, nobody is cooperating and providing us with the information we need to help us locate a suspect or what led to the shooting or anything else,” Lawhead said in a phone interview.

Two people, including the 17-year-old boy, were hospitalized in extremely critical condition, Lawhead said.