The head-on collision between a German motorcyclist and the eight British riders occurred on Tuesday afternoon on a motorway near Splügen, Canton Graubünden, said the Corriere del Ticino newspaper. The two victims, aged 50 and 56, died at the scene, the paper said, citing a police official. No other details were available.
The German and another British rider were flown to a hospital in the area, as traffic was diverted for hours.