LONDON, Nov 17 (KUNA) -- Four people were killed when a helicopter collided with a small airplane midair in northern London on Friday, British police said.
Two died in each of the two aircraft, police added in a statement.
It said the two planes took off from the same runway of a nearby airport, used for training on small aircraft.
Investigators are in Waddeson, Buckinghamshire, the location of the crash, it said. (end) mrn.bs