London (CNN)Three improvised explosive devices were found near major London transport hubs on Tuesday, in what police are treating as linked incidents.
The Metropolitan Police’s counter-terrorism command unit has launched an investigation into the devices, which were sent in small packages to buildings at or near Heathrow Airport, London City Airport and Waterloo train station.
All the devices were judged to be viable, and in one instance, the package burst into flames when staff opened it. No one was hurt.
