‌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 during the joint media briefing with the other officials.

“We have far too much gun violence in this city and in this country, and we’re coming off of a week in Seattle where we’ve had three major incidents of gun violence in just a few days,” she added.