A knife-wielding robbery suspect tried to flee police in a lower Manhattan subway station by leaping onto a moving train — but ended up falling under its wheels, officials said.

[The suspect] died at New York Downtown Hospital a short time later, officials said.

A 45-pound air-conditioning unit Tuesday fell six stories from an East Village apartment, crashed through the awning of a wine bar and seriously injured a man . . .

A sex-worker-turned-teacher blabbed about her exploits on a popular website the same day she was granted tenure, officials said yesterday.

“I said, ‘Well, you know, call her, tell her that she is being removed from the classroom,’ ” [Mayor Bloomberg] said yesterday.

The city will change the lettering on every single street sign — at an estimated cost of about $27.5 million — because the feds don’t like the font.

Street names will change from all capital letters to a combination of upper and lower case on roads across the country thanks to the pricey federal regulation, officials said Wednesday.

Gym-locker heists, bank robberies, daylight holdups — these New York City crimes have only one thing in common, and it is not the culprits.

It is the Yankees caps they wore.