NEW YORK — A trio of thieves stole $300,000 from an armored truck in a bold Brooklyn heist, grabbing a sack of cash while they distracted a Brink’s guard by asking for directions, police said Sunday.

The trio struck when an armored truck pulled up to a Chase bank on Eighth Avenue and 55th Street in Sunset Park about 1 p.m. Friday, authorities said.

The driver stayed in the truck while his co-worker, whose job it is to deliver and pick up cash, placed the bag of money on the bumper, police said.

That’s when two of the crooks walked up to the worker, asking for directions, police said.

While they spoke, the third thief slipped in and grabbed the bag, police said. He ran off south on Eighth Avenue with the score, while his accomplices scattered, police said.

Authorities released surveillance footage of the suspects Sunday, including pictures of the crook running off with the bag in hand, and asked the public’s help identifying them and tracking them down.