Mercer Island police responded to a report of a man shooting a rifle off a boat floating in Lake Washington, according to police.

The gun fire took place on Oct. 15 and was happening about 300 yards off the city of Renton shoreline. The caller was unaware of who or what the shooter may have been targeting.

MIPD responded to the call, in two marine patrol vessels. They contacted the boat and a lone man, at the south end of Mercer Island.

The 73-year-old man who was allegedly firing the gun lives in Seattle. He was turned over to Renton police for further investigation.

He has not been charged with a crime at this point. A detective will determine what charge, if any, is appropriate and applicable, said Renton police. There is no timeline for that decision.