"Stealing manhole covers is dangerous," said Milovan Blair, Con Edison's vice president for Brooklyn-Queens Electric Operations. "Anyone who steals these covers creates a serious hazard for pedestrians and motorists." Witnesses have reported seeing thieves wearing utility-style clothing but without official insignia prying open covers with a car jack, loading them onto pickup trucks and driving away, Con Edison said in a statement.

Manhole covers are stolen on occasion but the recent thefts are a marked increase, said Con Edison spokesman Michael Clendenin.

The covers are made of cast iron or composite materials and can weigh as much as 136 kg, he said. The high price of metals make them attractive to sell as scrap.