A tractor-trailer has jackknifed on the ramp leading to the Massachusetts Turnpike on Interstate 495 in Hopkinton.
The crash happened at 5:30 a.m. According to state police, a fuel tank ruptured and leaked 10 gallons of fuel.
The ramp to the Turnpike is open at this time.
Another crash was reported in Needham on Route 128 north at Highland Avenue after a crash involving a truck and several other vehicles.
There is no word on injuries.