Four people were shot, two of them critically wounded, in Renton late Friday night, according to police, part of a burst of gun violence in the Seattle area overnight.

A large party was unfolding at Ron Regis Park, in the 1500 block of Orcas Avenue Southeast, when shots were fired around 11:30 p.m. Friday, said Cyndie Morris, a spokesperson for the Renton Police Department. The party appeared to be mostly teenagers, Morris said, and casing were found scattered throughout the park.

The critically injured victims were taken to Harborview Medical Center, while the two others with serious injuries, were each taken by private vehicle to Valley Medical Center and a hospital in Auburn, Morris said.

As of Saturday morning, police did not have any information on possible suspects or circumstances leading to the shooting and were interviewing witnesses, saying the scene remained, “very fluid.”

Five gunshot victims were brought to Harborview overnight, ranging from teenagers to adults, including the two victims from Renton, according to Susan Gregg, a spokesperson for the hospital.

“We have seen an increase in gunshot wounds this past year,” she said. “It is trauma season, so this is what we see, but there has been a definite increase.”

About the same time as the Renton shooting, a man was fatally shot around 12:30 a.m. Saturday near Cal Anderson Park in Seattle’s Capitol Hill neighborhood.

The Seattle Police Department reported two other shootings early Saturday, in the Pioneer Square area and in Sodo, according to the department’s Twitter feed. A woman was shot in the leg in the Sodo incident. No information was immediately available on the person hurt at Third Avenue South and South Main Street.