A toddler was killed after being struck by a private ambulance Saturday in downtown Boston.

Police said the child was struck shortly before 1:30 p.m. on Nassau Street. The child was struck near the Tufts Medical Center emergency room and the Asian Community Development Corporation. 

The ambulance remained on scene while the child was taken to the hospital. Witnesses said the child’s mother collapsed in the street.

"I saw mom on the floor, the pavement, just crying in agony, writhing in agony on the pavement," said witness Raymond Pereyra.

The ambulance was eventually towed away. Police are investigating but believe this is a tragic accident.

Statement from CEO of EasCare, the company that owned the ambulance involved in the incident:

"Everyone at EasCare is deeply saddened by the incident that occurred earlier today. Our thoughts and prayers are with the family of the victim. EasCare will continue to cooperate fully with investigation in an open and transparent manner."

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