Authorities are asking for the public's help to identify a person who is possibly associated with the suspect in Saturday's mass shooting in Arizona.

A gunman went to a town hall meeting at the Safeway supermarket in Tucson. Six people were killed and 12 others were wounded, including U.S. Rep. Gabrielle Giffords.

Early Sunday morning, investigators released a surveillance camera photo of a man who was seen at the location where the shooting occurred.

Pima County Sheriff Clarence Dupnik told reporters Saturday that authorities were searching for a second individual who was a "person of interest" in the investigation.

He is described as a white male, approximately 40 to 50 years old. He has dark hair and was last seen wearing blue jeans and a dark blue jacket.

If you have any information about the individual, you are asked to contact 911, 88-CRIME or the Federal Bureau of Investigation at (520) 791-6974.