Video shows concrete crashing down from the ceiling of a Boston highway tunnel with several vehicles narrowly missing the falling pieces. Massachusetts state police said the falling debris damaged several cars,

State highway officials are conducting emergency inspections of the Prudential Tunnel in Boston after chunks of concrete fell onto the roadway Friday afternoon.

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