Police say they arrested a Lake Grove man who was running around a park in Lake Ronkonkoma with a gun in hand. 

Officers say a caller reported a man with a gun at Raynor Park Saturday around 4:30 p.m. They found the suspect on Lake Terrace Road.

Police say 20-year-old Kyle Cronin was caught with a revolver on him. 

Authorities also searched Cronin's home on Walnut Street in Lake Grove and say they found an AR-15.

Cronin is charged with criminal possession of a firearm and will face a judge at the end of the month.