Eastbound Kreutzer Road at Route 47 in Huntley was closed on Thursday because of a gas main leak.
Huntley Deputy Police Chief Michael Klunk said contractors working in the area heard a leak, and Nicor was called out to fix it.
Nicor had to dig deeper to cap it off, Klunk said, and as an abundance of caution the roadway was shut down.
Klunk said at 4:30 p.m. that while the eastbound section of Kreutzer Road still was closed, westbound Kreuzter and Route 47 were open.
"Nicor has it under control," Klunk said.
• This story will be updated with more information as it becomes available.