Counter terror police are investigating after three improvised explosive devices were sent to transport hubs around London.

The three packages, which police said were capable of igniting a small fire when opened, were sent to buildings at Heathrow Airport, City Airport and Waterloo Station.

The devices were contained in jiffy bags contained inside A4 size envelopes.

The Met Police said it was treating the incidents as linked but was keeping an open mind regarding motives.

In a statement a Met spokesman said: "At approximately 09:55hrs the Met Police received a report of a suspicious package at The Compass Centre, Nelson Road, Hounslow.

Read more: The Telegraph (UK)