Around 30 people participating in a traditional May 1 celebration were injured in an accident involving an agricultural vehicle in Germany. Police said Wednesday that 10 people had suffered serious injuries in the incident in the village of Kandern, near the borders with France and Switzerland. None of the injuries were considered life-threatening, but three people were taken to hospital in rescue helicopters. The vehicle, a so-called “May wagon” consisting of a tractor pulling an open trailer as part of May Day festivities, tipped onto its side on a sharp bend. A police spokesman said that th…