Four cars crashed into each other, causing one to roll over, on the Massachusetts Turnpike in Newton this morning, State Police said.
The extent of injuries has not yet been confirmed, police said.
State Police responded to the crash in the westbound lane prior to Exit 17 near Newton Corner at 7:48 a.m. The left and center lanes were closed, causing some traffic delays.
All lanes have since been reopened, but State Police told commuters to expect residual delays.