The TV presenter was involved in an accident at a Swiss mountain race in St Gallen, according to local media.

Mr West died on Friday night in Los Angeles after a short battle with leukaemia, his family said.

An SU-27, known by its NATO reporting name of "Flanker", was deployed to head off a US B-52H craft, capable of carrying a nuclear weapon, during exercises taking place over the Baltic Sea.

The forces are providing technical assistance to end the conflict in Marawi, on the island of Mindanao, which has claimed dozens of lives over the last three weeks.