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Police investigate a robbery at the high end s Saint Laurent shop on East 57th Street and 5th Ave.

Two of brazen thieves stormed into Saint Laurent in Manhattan Thursday evening and dashed out with a small fortune in pricey handbags before speeding off in a phony yellow cab.

Police said the thieves pulled up to the fashionable Fifth Avenue retailer at 5:50 p.m. in an SUV that was painted yellow to resemble a taxi.

They dashed inside and made off with the 15 high-end handbags worth more than $30,000, getting away before police arrived.

“They came in: one was wearing a ski mask one wasn’t,” an employee told The Post.

“They ran in and started trying to grab everything they could, we were trying to stop them from running out.”

Cops were still trying to determine how many bags were taken.

Detectives are also looking for a possible link to a similar May 3 incident at the Louis Vuitton store nearby where thieves used a sedan painted yellow to speed off.