A school bus plowed into a home in Rancho Peñasquitos on Tuesday.
The accident happened on Russet Leaf Lane near Deer Canyon Elementary School just before 2 p.m.
A teacher who witnessed the accident says the accelorator got stuck and the bus driver drove erratically before crashing.
At least two other vehicles appeared to be involved in the accident.
Medics attended to three patients. One of them was transported to a hospital. The other two refused treatment, according to the San Diego Fire Dept.
There were no students on the bus.