Toronto police say 12 people were transported to hospital with minor injuries after a TTC bus collided with a tractor trailer early Wednesday morning.

Police said the passengers were brought to hospital as a precautionary measure after the crash, which happened shortly before 7:30 a.m. in the southbound collector lanes of Highway 427, near Bloor Street.

Two lanes remained blocked after 8:30 a.m. as police continued to investigated the circumstances of the crash.

The accident involved the 191 Highway 27 Rocket, a TTC spokeswoman said. Southbound TTC buses on that route are being diverted via Eringate, Wellesworth, Westmall and Dundas.