Fire authorities said a blaze at an El Cajon tire store caused more than $750,000 damage early Saturday, but no one was hurt.

The fire at Broadway Tire, Brake and Auto Service Center at 1105 Broadway erupted around 2:40 a.m., a Heartland Fire dispatcher said.

Most of the loss -- about $600,000 -- was to the stock. Damage to the building was estimated at $160,000.