The sources said the three teens -- ages 17, 16 and 15 -- became lost in the sewer system while pretending to be the popular cartoon, movie and comic book characters, the New York Daily News reported Thursday.
"These three idiots were playing Teenage Mutant Ninja Turtles and wanted to go into the sewers," said one police source. "They were never in danger, just goofing off and being stupid."
Police said firefighters pulled the trio out of a manhole in the Kissena Park neighborhood of New York's Queens borough.
Officers charged the two older teens with criminal trespassing and the 15-year-old was released into the custody of his parents.