Danny Iudici for New York Daily News
Three National Grid workers were taken to Cornell University Hospital, one with serious injuries, after a gas explosion occurred while they were inside a hole working to fix a gas leak on Union Avenue at Hewes Street in Brooklyn on Friday. 
Three National Grid workers were injured in an explosion Friday as they repaired a gas line, officials said.
The workers were fixing the leak on Union Ave. near Hewes St. in Williamsburg about 12:45 a.m.
One of the workers was seriously injured. The other two suffered minor injuries. All three were taken to Weill Cornell Hospital.
