A leaking large water main under a Sunset Park street in Brooklyn caused a giant 15-foot-deep sinkhole Tuesday that blocked traffic and led the MTA to slow down subway trains, officials said. 

No injuries were reported, the Fire Department of New York said. The leak from the water main had washed away dirt and concrete, leading to the collapse of the street, the Department of Environmental Protection said. 

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The sinkhole at Fifth and 64th Street was large enough to cause authorities to shut down traffic in the area. The Office of Emergency Management said streets were closed to traffic between 63 and 65th streets, and between Fifth and Sixth avenues. 

The sinkhole opened near the underground N line, leading the MTA to slow train traffic as a precaution, a spokeswoman for the agency said. However, there did not appear to be any damage to the subway line itself. 

Con Edison spokesman Bob McGee said crews were working to cut electricity from live feeder cables that were exposed by the sinkhole but water from the leaking main was complicating that. "It's a potentially dangerous situation," he said. "Nobody is going to be getting in the water because of the electricity." 

So far, no power has been cut off but crews were looking to see whether they might be able to turn the electricity off further down the lines. Customers may be affected, depending on whether there are backup feeders. 

The OEM said that the sinkhole was reported about 7:30 a.m.