An investigation has been launched after three packages containing explosives were found near major transport hubs in London.
The Metropolitan Police said the "small improvised explosive devices" found in A4 postal bags at Heathrow Airport, London City Airport and Waterloo station were "capable of igniting a small fire when opened".
Irish police have also joined the investigation as the Heathrow and Waterloo packages had Republic of Ireland stamps on them, with Met's Counter Terrorism Command treating it as a "linked series".
All locations were evacuated and no injuries reported, local media said.
At least 14 killed in explosion at weapons depot in Syria
US hits five Iranian oil tankers after attack on Navy ships
UK gives air traffic provider a week to probe outage that halted flights
Serbia's President Vucic dissolves parliament, calls snap elections
With large crowds attending, Norway lays King Harald to rest
Jordan intercepts 18 Iranian ballistic missiles
Air traffic control issue disrupts flights at major UK airports
At least 73 injured after Houthi rebels attack Saudi civilian and energy facilities
