ST. LOUIS, July 17 (UPI) -- The Gateway Arch and Museum in St. Louis was evacuated and closed Thursday after a transformer caught fire, sending thick black smoke through the monument.
KMOV reported the thick black smoke could be seen for miles after witnesses said they heard a series of explosions in an underground transformer vault shortly before noon.
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No injuries occurred, although numerous emergency vehicles and personnel were sent to the scene.
KSDK said FBI agents and police detectives were dispatched to the scene as a precautionary measure until it was determined the incident was not terrorism related.
Officials said the Arch would be closed for at least two days while repairs are made.
