Police are seeking witnesses after three young men were shot in Dorchester’s Uphams Corner section Monday evening.

Around 7 p.m., officers responded to the 500 block of Columbia Road, where three men were each found suffering from a single gunshot wound, police said. Two of the victims are 19 and one is 21, and all three were taken to area hospitals with non-life-threatening injuries, according to a police report filed after the incident. No arrests had been made as of noon Tuesday.

Near the intersection of Columbia Road and Bird Street, officers found five 9mm bullet casings and other ballistic evidence, according to the report.

Sabrina Mitchell, 36, said she was sitting across the street on her porch when she heard at least six shots. She said she looked up and saw one young man collapse from an apparent gunshot wound.

Mitchell said she then shouted at another young man who was running away.

“I’m screaming, ‘Why are you running, why did you do that? The police [are] on their way,’” Mitchell said. “He started jetting.”

Mitchell said she also told her 7-year-old daughter to come up the steps onto the porch when she heard the gunfire.

“I got scared, because I knew it wasn’t just fireworks,” Mitchell said.

She also expressed shock that someone would fire at a group of people before dark.

“You can’t shoot somebody in broad daylight and get away with it,” Mitchell said.