Two people were killed and three others were wounded in a shooting at a BP gas station on Edmondson Avenue in Baltimore on Sunday night, CBS News Baltimore and WBAL-TV reported.

Police were called to the 2800 block of Edmondson Avenue Sunday night, CBS News Baltimore and WBAL-TV reported. WBAL-TV reported that officers went after a ShotSpotter alert at 10:25 p.m. CBS News Baltimore put the time officers responded at about 10:30 p.m.

Officers found a woman and three men with gunshot wounds, CBS News Baltimore and WBAL-TV reported. A fifth victim, a man, got to a hospital on his own, CBS News Baltimore and WBAL-TV reported. WBAL-TV reported that the woman was 34 and the men at the scene were 20, 24 and 48.

The woman and one of the men died, Police Commissioner Richard Worley said, CBS News Baltimore and WBAL-TV reported. WBAL-TV reported that the man who died was 20. The other three victims are expected to survive, CBS News Baltimore and WBAL-TV reported.

Worley said there appeared to be two or three shooters and that high-powered guns were used, CBS News Baltimore and WBAL-TV reported. "It looks like at least two, maybe three shooters," Worley said, WBAL-TV reported. No one was in custody as of Sunday night, CBS News Baltimore reported.

Police do not yet know why the shooting happened. "We don't know any of that yet," Worley said when asked about a motive, CBS News Baltimore reported. He said investigators hope to speak with the victims who survived and will look at video.

CBS News Baltimore reported that Baltimore police have responded to at least four mass shootings in the past month. "It is frustrating," Worley said, CBS News Baltimore reported.

Police are asking anyone with information or video to contact them or Metro Crime Stoppers at 1-866-7LOCKUP, CBS News Baltimore and WBAL-TV reported.

What we know: Two people died and three were hurt, and police believe two or three people fired.
What we don't: Who the shooters are and why they opened fire.