Mass shootings are on the rise in the US 1:56
(CNN) --
The suspect who shot and killed a woman and wounded two others at a church Friday night in Aurora, Colorado, knew at least one of the victims, police said.
The "exact relationship will not be released at this time," Aurora police spokesman Matthew Longshore said during a news conference.
"It wasn't just a random shooting inside this church," he said.
The shooting unfolded at Iglesia Iglesia Faro De Luz around 8 p.m. local time, according to tweets from the Aurora Police Department.
The church was hosting an event attended by 15 to 20 people when the shooting occurred, police said in a news release.
A 36-year-old woman, a 42-year-old man and a 40-year-old man were suffering from apparent gunshot wounds when officers arrived at the church, police said.
The woman died at the scene and the two men were taken to a hospital, according to authorities.
Another adult, who was not shot, was also taken to a hospital for other medical reasons, police said.
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Authorities have information on who the suspect "could be" and are working to confirm the identity, Longshore said.
The suspect had fled before officers arrived.
Investigators were conducting witness interviews early Saturday morning and scouring the area for surveillance video, Longshore said.
"The facts and circumstances leading up to this shooting are still being determined," police said.
CNN's Aya Elamroussi contributed to this report.