Lisbon  -  At least 30 people, including 27 schoolchildren, were slightly injured Friday when a bus transporting 60 people slipped off the road and tumbled two metres down the roadside in Esposende, north of the Portuguese city of Oporto, police said.

The driver was believed to have veered too far when trying to avoid hitting a vehicle coming from the opposite direction in rainy weather.

Most of the passengers were children going to several schools. (dpa)