Officials said that “non-structural concrete at an expansion joint” below Huntington Avenue became dislodged and fell into a travel lane on the interstate.

Concrete debris fell from the Prudential Tunnel in Boston Friday afternoon, damaging several vehicles. The incident was captured by a MassDOT camera. State Police said the debris fell into the left and middle travel lanes in the tunnel on the westbound side of the Mass Pike shortly after 1 p.