Texas police say a weekend shootout involving rival motorcycle gangs that killed nine people and injured 18 apparently began with a parking dispute and someone running over a gang member's foot.
An uninvited group appeared for the meeting of a loose confederation of biker gangs held at a Twin Peaks restaurant on Sunday, Waco police sergeant W Patrick Swanton said.
One man was injured when a vehicle struck his foot, Mr Swanton said.
This caused a dispute that continued inside the restaurant, where fighting and then shooting began, before spilling back outside.
Mr Swanton also said that of the 18 injured, seven remain in hospital. He described their conditions as stable.
He said the police investigation is being hampered by some who "are not being honest with us".
About 50 weapons were confiscated from the scene of the shooting.
Mr Swanton said that nearly all the weapons were firearms and knives, but also included a chain with a padlock for the purpose of beating others.
He said upward of 100 weapons may be found once authorities have finished investigating the crime scene.
Preliminary post mortem examinatiion reports show the nine victims all died of gunshot wounds.
The reports provided by a McLennan County official showed the men ranged in age from 27 to 65, and some were shot in the head, neck or torso.