WAWA, ONT. - A Goulais River, Ont., man accidentally shot himself in the forehead trying to kill a mouse.

The man was using the butt of a rifle to kill the rodent when the weapon went off Wednesday at a camp on Anjigami Lake, about 40 kilometres southeast of Wawa, provincial police said.

A bullet grazed his forehead, said Const. Amanda Huff.

The man didn't know the weapon was loaded.

"He was very lucky," said Huff.

The man was treated in hospital and released.

Dale Whitmell, 40, was charged with careless use of a firearm and will appear in court Sept. 17.