Terror probe after three explosive devices found at London station and airports

A counter-terror investigation has been launched after three small explosive devices were found at buildings at major transport hubs in London.

Police responded to reports of suspicious packages at Waterloo train station and office buildings at Heathrow and London City airports on Tuesday.

All the packages were A4-sized white postal bags containing yellow Jiffy bags and appeared capable of igniting a small fire when opened, police said.

Scotland Yard said officers are treating the incidents as linked and are keeping an open mind regarding motives.

No one has been injured in the three incidents, police said.