HOUSTON, Dec. 29 (Xinhua) -- Houston police said Friday afternoon that four people were dead including a shooter who opened fire at an automotive business in southwest Houston, Texas, the United States.

Police say a gunman walked into an automotive business and opened fire, killing three people and then himself.

No other injuries have been reported. A motive for the shooting is unknown at this time. The identities of the victims and the gunman have not yet been released by authorities.

The automotive business locates about 20 km southwest of downtown Houston.