Universities have urged staff and students to be vigilant after a controlled explosion was carried out on a suspicious package in Glasgow.

Police are linking the package sent to Glasgow University with three explosive devices found in London on Tuesday.

Several buildings were evacuated and nearby roads closed after the discovery on Wednesday morning.

A controlled explosion was carried out on the device, which is being investigated by counter-terrorism officers.

Later on Wednesday evening, Police Scotland confirmed it was working with the Metropolitan Police to share any information or intelligence.

It comes after packages arrived at London's Waterloo railway station and offices at Heathrow and London City airports on Tuesday.

Aberdeen and Dundee universities have both told staff to be alert to the potential threat.

An Aberdeen University spokesperson said: "We are reminding staff and students of the need to be vigilant when dealing with mail and, if they are concerned about any package or letter, urging them not to handle or move it, but instead contact our security team for guidance.

"Our front line staff within facilities management are trained in dealing with suspicious packages and have been advised to be extra vigilant."

Dundee University chief operating officer Jim McGeorge wrote to all staff and students urging vigilance.

He said: "Like other large institutions we have received advice from the police that we should be alert to the threat of suspicious mail being sent.

"Our mailroom staff have been briefed but we are also aware that many people across the university may receive mail directly.

"I ask that you be vigilant in respect to any mail you may be receiving. There is advice available from the UK Government on what to do if you receive a suspect package."