TUCSON, Arizona (Reuters) - Arizona shooting rampage suspect Jared Loughner was pulled over for running a stoplight about two hours before he shot six people dead and wounded 13 others at a Tucson shopping center, authorities said on Wednesday.

A state Game and Fish Department officer made the traffic stop at around 7:30 a.m. local time on Saturday and issued Loughner a verbal warning after conducting a check of his driver's license and registration and finding no outstanding warrants, the agency said.

The department statement did not reveal where the traffic stop occurred.

The 22-year-old former community college student is accused of opening fire a little over two hours later with a semi-automatic pistol outside a supermarket in Tucson, gravely wounding Congresswoman Gabrielle Giffords and killing six bystanders. A dozen other people also were hit by gunfire.

The news release said Game and Fish Department officers do not normally make routine traffic stops, except in cases of public risk, such as running a red light, though game wardens are fully sworn and trained law enforcement officers.

(Editing by Jerry Norton)