A search continued on Sunday for two men who appeared to fire guns at each other and in the process shot at least 12 other people at a popular street festival in a historic neighborhood in Toledo, Ohio, the authorities said.

A little after 5:30 p.m. on Saturday, as hundreds were gathered at the Old West End Festival, shots rang out and the crowd scattered in all directions, video posted online showed.

In the footage, which provided a window into the grim aftermath, emergency personnel can be seen tending to victims lying on the grass. In one video, a young man walks down a street lined with Victorian homes as blood darkens his white shirt and bystanders call for help.

The festival, a two-day event set in the largest collection of Victorian, Edwardian and Arts and Craft homes in the United States, brings live music, food vendors and parades to the northwest corner of Toledo. It doubles as the kickoff to the Ohio festival season and as the regional kickoff to summer.

Organizers canceled the remainder of the event.

“Too often we turn on the news and learn of a celebration somewhere that turns into a tragedy,” organizers wrote on social media. “Now, that news comes from our own neighborhood.”

“Many people want to know how we proceed from such a dark place,” they added.

At a news conference on Saturday, the authorities said the victims ranged from ages 14 to 61; several were considered in critical condition.

An update on their conditions was not provided on Sunday morning.

This is a developing story and will be updated.