A 22-year-old man is held by police hours after a tip-off prompts a Rotterdam concert to be cancelled.
It is thought the three people died on Europe's highest peak in the 1990s.
Angelo Quirino's family from Manchester had been staying at a villa in Italy when he died.
Intrepid journalist remembered
Spyware firm sparks controversy
How Sicilian oranges are being turned into fashion, fuel and flour
The engineering miracle under the Alps
What is the European Court of Justice?
What price would you put on a passport?
Broadcast time 08:06 BST - 08:30 BST
Broadcast time 08:50 BST - 09:00 BST
Broadcast time 10:06 BST - 11:00 BST
Broadcast time 11:06 BST - 11:30 BST