It happened shortly before 1 p.m. near East 13th Street North and Belmont, which is just west of Oliver.
A 911 dispatch supervisor says a construction crew was working in the area when the gas line ruptured and caught fire. Firefighters reported seeing a large fire on arrival. No injuries have been reported.
Nearby homes have been evacuated, and 13th Street is closed between Oliver and Hillside. Drivers are asked to avoid the area.