A couple of individuals were severely injured when they crashed head-on into each other. The accident happened near Hopkins and Dorcester Streets tonight.
One of them was not conscious and the other was trapped in the vehicle. Numerous emergency medical personnel were dispatched to the intersection.
The incident took place at almost 7 p.m. on the border of Billerica.
Hopkins Street was reopened to vehicles at 8 p.m..
Billerica streets that were affected include Alexander Road at Cook Street which was shut down.