Three people were killed and four others, including a toddler, were wounded on Sunday in a shooting at a downtown Seattle food ​festival, police said, adding that a suspect had been taken into custody.

A second ‌suspect was also believed to be involved, and officers were searching for that person, Seattle Police Department Assistant Chief Tyrone Davis said in a media briefing late on Sunday.

Davis said the police believed two people ​were shooting at each other. The incident took place at the Bite of Seattle ​food festival at Seattle Center.

“What happened here today at the Seattle Center was an unbelievable tragedy, and a horrific act of violence,” Seattle Mayor Katie Wilson said.

“We have far too much gun violence ​in this city and in this country,” she added.