A gas line explosion at a North Carolina veterinary office caught on camera sent at least three firefighters to a hospital after a hit-and-run driver ruptured a line and fled.

Three firefighters were injured in the North Carolina explosion, which resulted from a car crashing into a building's gas line.

"We didn't know what was going on." The gas line fed into the Eastern Carolina Veterinary Medical Center, a new location to be opened by Eastern Carolina Veterinary Referral, which was undergoing renovations and planned to open in September.

Four firefighters were hurt from battling a fire around 1 p.m. Tuesday in Wilmington. An impaired driver hit a gas line at the fire on Bob King Drive, causing the explosion before driving off, officials said.