(KMOV.com) -- Firefighters were investigating after a flare was found on top of a building in north St. Louis Thursday morning.
St. Louis Police reported a flare was found burning on top of a tire shop in the 4200 block of Natural Bridge around 3 a.m.
Police said they believe the flare was intentional. Witnesses said they saw firefighters place a gas can into an evidence bag.
The building was not damaged.
Additional information was not immediately available.