Counter-terror police are investigating after three bombs were found at Heathrow, London City Airport and Waterloo station today.
Areas of the three main transport hubs were sealed off today after suspicious packages were sent to each in actions police believed are linked.
All the bombs were posted in A4-sized postal packages containing yellow padded envelopes.
Police say the devices were capable of igniting when opened.
A Scotland Yard spokesman said: ‘The packages – all A4-sized white postal bags containing yellow Jiffy bags – have been assessed by specialist officers to be small improvised explosive devices.
‘These devices, at this early stage of the investigation, appear capable of igniting an initially small fire when opened.’
The three sites are major transportation hubs and deal with tens of thousands of passengers every day. They are open for passengers as normal.