Riverhead Town police are investigating an overnight break-in at Jerry and the Mermaid Clam Bar and Grill on East Main Street.
Police responded to a report of a commercial alarm at 2:29 a.m. Friday and found an east side door ajar. Officers discovered someone had entered the rear covered deck portion of the establishment and forcibly entered the main building by breaking a south side window, police said.
It was unclear if anything had been stolen, police said.
The investigation is ongoing and police are asking for anyone who may have witnessed something suspicious in the area at that time to call the detective division at 631-727-4500 ext. 332.