CHICAGO (CBS) — A construction crew hit a gas line in River North Thursday morning, prompting police to shut down nearby streets.

Around 9 a.m., the crew hit the gas line at the southeast corner of Grand Avenue and Clark Street. No one was injured, but the accident prompted police to shut down streets nearby. They also shut down intersection of Dearborn and Illinois streets a block southeast, where the Engine Company 42 firehouse is located.

The Fire Department called a Level 1 hazardous materials response for the gas main rupture.

As a result of the rupture, the Chicago Transit Authority rerouted the No. 65 Grand bus in both directions, as well as southbound No. 22 Clark buses, which run on Clark Street. Northbound No. 22 buses, which run on Dearborn Street, were not affected.

The gas main break was under control by 9:45 a.m. No one was injured or sickened. But the junction of Dearborn and Illinois streets remained closed.