(AP) — Arson is suspected in three Fremont fires that occurred within an hour.

Fremont Police Department Sgt. Bob Buer said firefighters received a call about a blazing bus at 5:11 a.m. Tuesday Just a few seconds later a call came in about a car in flames.

Buer says firefighters then responded at 6 a.m. to a call about a shed on fire behind a church.

No injuries have been reported.

Buer says all three fires are being treated as arson and are being investigated by state authorities.