(Updated 3:10p.m.)— A key stretch of Dorchester Ave. between Columbia Road and Freeport Street has been re-opened to traffic at this hour. It has been closed for a period of more than an hour this afternoon after a gas main break near Ryan Playground.

According to a spokesman for National Grid, a contractor doing excavation work near 944 Dorchester Ave. accidentally ruptured a 30" low pressure gas line around 1:35 p.m. Repair crews are on the scene and expect to have the site cleared by 4:30 p.m.

David Graves, a spokesman for National Grid, said that no buildings were impacted and the incident did not trigger any evacuations.