BBC News

Five people were killed after two civilian helicopters were confronted in the middle of the air in Finland, local police said.
Helicopters crashed near Era Airport around 12:00 local time (10:00 GMT) after flying together from the Estonian capital of Tallinn.
Authorities found the remains of helicopters in a wooded area. Police say there were two people in one helicopter and three in the other.
They were on the way to an aviation event at the Piikajärvi Flight Center in Kokemäki, local media reported.
The aircraft were registered abroad civilian helicopters. The crash is being investigated by police.
Finnish and Estonian officials said they were working with each other in the probe.