Watch shocking moment group of robbers steal jewelry worth $20M in 30 seconds

A video of how a group of robbers stormed a shop and took away jewelry worth around $2 million has been released by authorities in New York.

According to police reports, it took the robbers only 30 seconds from start to finish to steal the jewelry from a Bronx store.

Surveillance video shows one of the suspects approaching the store before waiting to be let in. After a Rocco’s Jewelry employee buzzed him in, the white T-shirt-clad suspect held the door open for three masked men in black clothing.

“Once inside the store, the three individuals used a hammer to smash open the display cases and removed a large amount of high-end diamond jewelry.” said police in a news release.

“The jewelry was placed into bags being carried by the individuals, who fled the location on foot heading southbound on Webster Avenue.”

One of the thieves is seen using a hammer to smash glass cases as the others shove jewelry into bags.

The heist, which lasted less than 30 seconds appears to have been carefully planned.

The NYPD is asking anyone with information on the four men to come forward, offering a $3,500 reward as compensation.