Graubünden: Three persons including two 14-year-old campers and a pilot were reportedly killed in a plane crash at an aviation summer camp in Switzerland.
A teenager was also seriously injured in the incident.
According to reports, all three deceased were believed to be in a single-engine plane as a ride organised by a local flying club in the region of Graubünden.
The camp was organised with the aim of encouraging youngsters to pursue careers in aviation.
Police is investigating to determine the cause of the reported incide