HOUSTON, Jan. 8-- Two brothers were killed and the son of one of the victims was wounded in a shooting at a used car dealership in the U.S. city of Houston Thursday, local media reported.

The deadly shooting happened around Thursday noon at the family-owned dealership in north Houston, according to the Houston Chronicle.

A mechanic who worked at the car lot found all three bodies in a pool of blood in the office. Two of them died at the scene while the third was rushed to an area hospital in critical conditions.

The dead were later identified as two brothers and co-owners of the dealership. The third victim is the son of one of them. All were shot in the head, police said.

Police have not identified a motive for the shooting. They said nothing appeared to have been taken from the business.

A person of interest has been arrested but charges have not yet been filed. The investigation is still underway.