Five masked men smashed a glass case in a posh New York City jewelry store on Thursday, grabbing 17 watches in a daring robbery in broad daylight, police said.

The five men walked into the Cartier store on Fifth Avenue in Manhattan at about 12:30 p.m. ET, carrying hammers, police said.

Police did not say how much the stolen watches were worth but city newspapers said the timepieces are valued at more than $700,000 US or more than $782,000 Cdn.

There were no arrests in the case, police said.