Big heist by high-schooler

Teen terror

A teenage girl swiped a diamond ring, watch and $3,500 from an 84th Street apartment on Jan. 27.

The victim told cops that his video surveillance shows an unknown, high school-age girl slipping through the unlocked door of the apartment, which is between Fifth and Sixth avenues, at around 6:45 am. The five-foot-four, pony tail-wearing kid made off with the goods a few minutes later.

Watch out

Someone stole a Rolex watch from a 77th Street doctor’s office on Jan. 14.

The victim told cops that he left his pricey accessory on a desk in the office, which is between Fourth and Fifth avenues, at around 8 am. It was gone when he returned several minutes later to retrieve it.

Ft. Ham heist

A thief scored big at a Fort Hamilton Parkway apartment on Jan. 31, making off with jewelry, three computers, cards, an iPod and an iHome dock.

The victim told cops that he left his crib, which is between 85th and 86th streets, at 10:30 am. When he returned at noon, he saw that his front door was open even though he had locked it. The victim realized that the perp must have climbed up the fire escape and through his unlocked window to make off with the major stash.

Salty dog

A sticky fingered perp swiped a purse from the Salty Dog bar on Third Avenue on Jan. 30.

The victim told cops that she left her H&M bag on the counter of the night spot, which is between 75th and 76th streets, while grabbing a drink at around 3 am. It was swiped within minutes. The bag contained cash, checks, cards and a cellphone.

— Alex Rush