Scottish police have said a suspicious package sent to the University of Glasgow is linked to similar packages sent to London transport hubs.
Officers are investigating after a suspicious package was sent to the University of Glasgow earlier on Wednesday.
They have linked the incident with a similar investigation being carried out by London's Metropolitan Police into three small devices being sent to Heathrow Airport, London City Airport and Waterloo Train Station in the British capital on Tuesday.
The white envelopes - all A4-sized white postal bags containing yellow Jiffy bags - contained an Irish return address as well as Irish stamps.
A controlled explosion was carried out on the suspicious package in Glasgow.
Nobody was injured in the incident.
Police Scotland officers investigating a suspicious package sent to the University of Glasgow today have now linked the incident with a similar investigation being carried out by the Metropolitan Police Service into three small devices sent to addresses in London on Tuesday. pic.twitter.com/9XZ4AQYzfX
— Police Scotland (@policescotland) March 6, 2019
On Tuesday, Gardaí confirmed they were working with UK counter-terror police.
Police have said the London incidents are being treated as a linked series and investigators are keeping "an open mind" regarding motives.
The packages were found to contain "small improvised explosive devices."
Police said they were capable of "igniting an initially small fire when opened."
Scottish First Minister Nicola Sturgeon has thanked all those involved in the Glasgow operation.
— Nicola Sturgeon (@NicolaSturgeon) March 6, 2019
Additional reporting: Jack Quann