MOUNTAIN VIEW, CA - JULY 01: Mick Thomson of Slipknot performs in concert at 2012 Rockstar Energy Drink Mayhem Festival at Sh
Jay West/WireImage

Slipknot's longtime guitarist Mickael "Mick" Thomson has been stabbed in the head by his brother, Andrew Thomson, in the front yard of his Clive, Iowa home. According to the Des Moines Register, police report the altercation began inside the building around 4:25 A.M. on Wednesday, eventually ending outside. Both men were intoxicated.

Mick, aged 41, and his brother, aged 35, were both sent to the hospital in separate vehicles. Mick suffered a knife wound to the back of the head. Both brothers are said to be suffering serious, but not life-threatening injuries. No charges have been pressed at this time.

Slipknot is currently preparing for their spring Prepare for Hell Tour, kicking off in April, featuring metalcore veterans Hatebreed

Stay tuned to Fuse for updates on the story.