Fire crews are investigating a massive Union Pacific train derailment believed to be caused by heavy rains east of Interstate 10 Tuesday afternoon.
At least 20 railcars were involved, said Brian Keeley, a Northwest Fire District spokesman. He said there were no immediate reports of hazardous materials on the train.
According to Marana Police, the frontage road near Twin Peaks Road is closed due to the train and flooding in the area.
Fire crews are investigating the heavy debris scattered across the frontage road and train tracks, Keeley said. The frontage road from Twin Peaks to Avra Valley Road will be closed for approximately 24 to 48 hours due to cleanup.
The Northwest Fire District said the derailment was caused by the rain. Keeley added there was running water across the tracks as personnel arrived on scene.
There were no reported injuries in the incident.
No further information has been released. Drivers should avoid the area.
Photos: Union Pacific train derailed north of Tucson
Union Pacific train derailment in Marana
Updated
Crews work on the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018
Union Pacific train derailment in Marana
Updated
Piles of product lies alongside fallen train cars at the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018.
Union Pacific train derailment in Marana
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A crane lifts pre-fabricated rail sections onto the track bed during the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018.
Union Pacific train derailment in Marana
Updated
Crews work on the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018.
Union Pacific train derailment in Marana
Updated
A crane lifts pre-fabricated rail sections onto the track bed behind train car debris during the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018.
Union Pacific train derailment in Marana
Updated
Packages litter the area around the fallen shipping cars during on the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018.
Union Pacific train derailment in Marana
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Workers sort through packages being pulled from overturned cars during the cleanup of Tuesday's Union Pacific derailment north of Twin Peaks Rd on July 11, 2018.
Train derailment
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Union Pacific train derailment on the east side of I-10 just north of Twin Peaks Road in Marana on July 10, 2018.
Train derailment
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Union Pacific train derailment on the east side of I-10 just north of Twin Peaks Road in Marana on July 10, 2018.
Train derailment
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An empty flatbed car on a bridge over a ditch filled with run-off following a train derailment just north of the Twin Peaks exit on I-10, Tuesday July 10, 2018.
Train derailment
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Several cars of an east bound train that derailed just north of the Twin Peaks exit on I-10, Tuesday July 10, 2018.
Train derailment
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Several cars askew but still attached to the front part of a train that lost several cars near the rear of the train to derail just north of the Twin Peaks exit on I-10, Tuesday July 10, 2018.
Train derailment
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Several cars and debris from an east bound train derailment just north of the Twin Peaks exit on I-10, Tuesday July 10, 2018.
Train derailment
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Several cars lie in a rain filled ditch, the rear portion of a train derailment just north of the Twin Peaks exit on I-10, Tuesday July 10, 2018.
Derailment
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Several partially clinging to the tracks and still attached to the lead train, part of a derailment just north of the Twin Peaks exit on I-10, Tuesday July 10, 2018, Tucson, Ariz.
Update video to train derailment. Follow this feed for updates pic.twitter.com/uZa3wgisQC
— Northwest Fire (@NorthwestFire) July 10, 2018
