Des Plaines Fire Dept. crews responded to a natural gas leak today (Wednesday) at Seventh Avenue and Yale Court, near the Cumberland Circle roundabout. According to Fire Chief Alan Wax, crews were dispatched to the scene at 1:39 p.m. and arrived at 1:45 p.m. to handle the outdoor gas leak. He said a gas main was struck and fumes were blowing into the air. A crane and construction equipment were at the scene and parts of the sidewalk were blocked off for a project already underway. Crews were still on the scene as of 2:24 p.m. Nicor arrived by 2:10 p.m. Wax said it was unknown what caused the main to break or how long crews might have to remain at the scene to handle the problem. He could not confirm if any nearby buildings had been evacuated.