London: A counter-terrorism investigation was launched after three small improvised explosive devices (IED) were found at Heathrow Airport, City Airport and Waterloo station, said the UK police on Tuesday. Also Read - I am Taking help From Seniors like Dhawan, Rahane, Ashwin on Strategic Decisions: Pant

According to the London Metropolitan Police, the three devices sent to the above-mentioned airports’ stations are capable of igniting an initially small fire when opened. “The Met Police Counter Terrorism Command is treating the incidents as a linked series and is keeping an open mind regarding motives,” read the statement further. Also Read - Prince Philip, Duke of Edinburgh, Dies at 99; UK Announces National Mourning

The Met Police 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. Also Read - New York to London in 4 Hours On a Plane That Travels Faster Than Speed of Sound? Tantalizing Possibility

While one mailer was found near Heathrow Airport, another mailer turned up near City Airport, and the third in the mailroom at Waterloo Station. A building at the Heathrow Airport was evacuated as a precaution after the package was opened and part of it burned.

As per reports, no one was injured by the devices and the services remained unaffected.