15-year-old arrested after Seattle Center mass shooting leaves 3 dead, 4 wounded

A 15-year-old was taken into custody as police continue to search for a second suspect after three people were killed, and four others were wounded Sunday in a mass shooting at the Seattle Center, according to Mayor Katie Wilson and police.

"We believe this teenager opened fire in the crowd, but details are still under investigation," Wilson said. 

No homicide charges have been filed against the teen, who was booked into juvenile detention on suspicion of firearms violations and first-degree assault, Wilson said.