A moped driver was arrested late on July 4th in Revere after police said he struck a trooper who was trying to de-escalate an aggressive crowd.

The incident occurred on Thornton Street in Revere as July Fourth celebrations were underway, drawing hundreds of people to the area.

A Massachusetts State Police trooper was hit by a moped and injured while trying to de-escalate an "aggressive" crowd of hundreds gathered and setting off illegal fireworks in Revere on Friday night,