Story highlights Report: The fight started inside the house and spilled onto the front yard

Both men were taken to hospital in separate ambulances

(CNN) Slipknot's guitarist Mick Thomson was stabbed in the head during a knife fight with his brother in Iowa, authorities say.

Thomson got into an altercation Wednesday with his sibling at a home in Clive, police told CNN affiliate KCCI.

The fight started inside the house and spilled onto the front yard, prompting a neighbor to call authorities.

Both men were taken to hospital in separate ambulances, according to the affiliate.

It said the musician was wounded at the back of his head, but did not specify what kind of injuries his brother, Andrew Thomson, suffered.