A fire has broken out at the SoMa Chevron located on 9th and Howard Streets. It appears to have started when a white shuttle bus (pictured below) caught fire, but it has now spread from the bus to the gas station.

A video sent in by a tipster shows the fire in full force, and the same tipster provided a brief description of the scene.

It looked to me like a bus or van had caught fire and was engulfed in flames, and those then reached the roof which also caught fire. Then a pump caught fire. Then the fire engine got here and they got some water on it and then there was an explosion, but I think it's under control now.

The cause of the fire is unknown, but we will update when we know more. Meanwhile, smoke from the fire can be seen from across the city.

Update, 3:20 p.m.: It appears that firefighters have managed to extinguish the flames.

Update, 3:30 p.m.: According to Andria Borba, a reporter with CBS 5, one firefighter was injured.

It appears that the shuttle bus was severely overheating before it entered the gas station, where its engine caught fire.

The fire was first reported at 2:32 p.m, notes NBC.