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TIPTON COUNTY, Ind. – A crash involving two semi trucks led to mandatory evacuations in Tipton County, where officials were concerned about a hydrochloric acid spill.

By about 9 a.m., Indiana State Police said there was no hazmat danger and residents would be able to return to their homes soon. The leak has stopped.

According to the Tipton Police Department, the crash happened on the railroad tracks at County Road 100 S and U.S. 31 northbound just north of State Road 28. Northbound U.S. 31 is closed between Division Road and State Road 28. Police anticipated a lengthy shutdown. Southbound was down to one lane.

The call came in around 5:30 a.m. ISP said a truck carrying hydrochloric acid stopped at the railroad tracks when another truck rear-ended it. Both drivers suffered minor injuries.

Houses on the east side of U.S. 31 from County Road 100 S to Division Road were under a mandatory evacuation earlier in the morning, and Tipton police described the spill as “significant.”

Acid, combined with spilled diesel fuel, damaged the surface of U.S. 31. Currently, northbound U.S 31 at Tipton County Road 100 South is closed. Traffic is being diverted onto State Road 28. Southbound U.S. 31 is open, but could have periodic lane restrictions as workers from the Indiana Department of Transportation conduct mill work on the damaged road.

Several agencies are involved in the response, including Tipton police, the Tipton County Sheriff’s Department, Hamilton County Hazmat, Tipton County Hazmat, Tipton County EMA and Indiana State Police.

A representative from Norfolk and Southern was also at the scene to assess the railroad, which was  closed at the crash site due to the amount of debris.