A tractor trailer that became jackknifed on the Mass Pike in Framingham has closed down all eastbound lanes on the busy thoroughfare.

The state Department of Transportation alerted travelers of the jackknifed truck just before 11 a.m. Tuesday, and around noon, officials said traffic is being diverted off exit 111 to Route 9.

Delays are expected as the cleanup is ongoing in the area of mile-marker 112.

Officials did not say whether the incident, which is under investigation, caused any injuries.

— Developing