BERLIN, May 1 (Xinhua) -- An accident that occurred Wednesday involving a trailer in southwestern Germany has left 30 people injured, 10 of them seriously, according to the German news agency dpa.
Three people were taken to hospitals in rescue helicopters, but the injuries are not life-threatening, a police spokesman has said.
The accident took place at around 1 p.m. local time in the village of Kandern, near the city of Freiburg when the people on the trailer were celebrating May Day, which is observed in many countries to celebrate workers' rights.
Local media reports said a trailer pulled by an agricultural machine tipped onto its side in a sloping left-hand bend and the passengers fell out of the trailer.
A spokesman said the precise cause remains unclear, suggesting that excessive speed or incorrect weight distribution could be potential factors. ■