CHICAGO (CBS) — An off-duty CTA employee was arrested in the Back of the Yards neighborhood overnight, on suspicion of drunk driving, after crashing into an ambulance carrying a patient to the hospital.

Around 12:30 a.m. Thursday, a Chicago Fire Department ambulance was transporting a patient and a family member to the University of Illinois Medical Center, when it was hit by a pickup truck at Garfield Boulevard and Ashland Avenue.

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The driver of the pickup, an off-duty CTA worker, was given a field sobriety test, then taken into custody on suspicion of driving under the influence.

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The patient and relative who were in the ambulance were transferred to another ambulance to continue to the hospital.

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There were no reports of injuries from the crash.