Moose was loose under the caboose!

Hero cops saved a terrified brown puppy called Moose from underneath a No. 2 train at 14th street in a dramatic — and heartwarming — moment captured on newly released video.

The petrified pup had escaped from a nearby doggy day care facility after someone left the door open — and was spotted cowering under the train car by onlookers who called cops, according to the Daily News .

Detective Frank Sarro crawled along the tracks, whistling and made kissing noises to coax Moose out from under the train, in bodycam footage released by the NYPD on social media yesterday. 4

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“C’mon buddy,” Sarro said while he searched for the pup, flashlight in hand.

Thankfully, Sarro was able to grab Moose, who didn’t protest while being carried to safety.

“Aw h

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