STOCKTON — Fire investigators have not determined a cause of a Sunday morning fire at the Napa Auto Parts, 423 S. Cedar in Stockton, according to the police department.

The blaze early Sunday did extensive damage.

An official dollar amount of the damage has not been determined. There were no injuries reported.

A crew from the city of Hays, with one of the two ladder trucks owned by the city responded to Stockton to help fight the blaze.

Hays Fire Chief Gary Brown said fire officials from Stockton called shortly after arriving on scene and asked Hays to bring a ladder truck.

A crew of five Hays firefighters was sent to help fight the blaze. The HFD also sent an air truck to assist.

Check Hays Post for details as they become available.