Three men disguised as construction workers in hard hats and orange vests assaulted a Brooklyn Heights jewelry store owner on Thursday evening before making off with jewelry and hundreds of thousands of dollars in cash, according to the NYPD.

Police from the 84th Precinct responded to a call of a robbery in progress at Court Street Jewelers near Joralemon Street just after 5:30 p.m., a spokesman said. Upon arrival, they encountered the store's 67-year-old owner with a laceration to the head. Four men had already fled into the Borough Hall subway station, according to the NYPD, making off with $250,000 in cash and "half a million" in jewelry.

Three suspects allegedly entered the store after 5:00 p.m. and displayed a handgun before assaulting the owner, according to the NYPD. A fourth suspect wearing a Tyvek suit allegedly stood guard outside the store, holding an umbrella and a sign that read "Danger Asbestos—Men Working."

"He had his head bashed open," one witness told the NY Post, referring to the shop owner. "He was like running around screaming: ‘Help me, help me.’ A lot of people were calling the cops—it was really crazy."

Photos from the scene show the shop owner on a stretcher, his face bloodied. He “was chasing the person who robbed him around [the block]," another witness told the Brooklyn Daily Eagle.

No arrests have been made as of Friday morning. Police recovered one of the construction worker disguises from the Borough Hall subway platform. The asbestos sign was also recovered.