A mangled mess of tractor trailers in Ajax Wednesday morning.

OPP crews are working to remove the wreckage of three transport trucks that collided in the eastbound lanes of the 401, just east of Westney.

It happened before 1 a.m., and OPP say there was a lot of damage to one of the trucks, and clean-up may last right up until 8 a.m.

One of the drivers was trapped and had to be extricated. He was airlifted to hospital in critical condition, another suffered minor injuries and the third was not hurt.