Three small bombs sent to London airports, rail station: Police

No one was injured by the devices and services were not affected

London's counter-terrorism police said they had launched an investigation into who mailed three small bombs to two airports and a major rail station on Tuesday.

No one was injured by the devices, one of which caused a small fire in an office building at Heathrow airport.

"The Met Police Counter Terrorism Command is treating the incidents as a linked series and is keeping an open mind regarding motives," London's police force said.

They received the first report of a suspicious device at Heathrow at 0955 GMT after staff opened a package which caught fire.

Later, a similar package was identified in the post room