More than 40 Scots who were present at the Manchester Arena terrorist attack have been identified by police.

Monday's suicide bombing led to the deaths of 22 people, including 14-year-old Eilidh MacLeod from Barra in the Western Isles.

In total, 116 people were admitted to hospital after the atrocity, including six who received treatment following the attack on the Ariana Grande concert.

On Thursday, Police Scotland Chief Constable Phil Gormley said armed officers had been deployed to airports and train stations earlier this week to identify potential witnesses.

In an update to the board of the Scottish Police Authority, Mr Gormley said: "In broad terms, we had 41, so far, people from Scotland who have identified themselves or been identified to us as witnesses that were present at the event."

He paid tribute to Eilidh, saying the "deepest sympathies" of all at the force went to her family.

Her friend, Laura MacIntyre, 15, also from Barra, remains in hospital being treated for serious injuries and family liaison officers from Scotland have travelled to Manchester to support both families.

Mr Gormley said extra resources had been deployed to the island, adding: "It's a tragedy of unimaginable proportions that has been wreaked on those families and the people of Manchester."

Troops have been deployed at Ministry of Defence and civil nuclear sites across Scotland to free up armed officers after the UK's terror threat level was raised to critical.

"Based on what I know at the moment, there is no foreseeable prospect of us needing to ask for military colleagues to patrol in the public space," Mr Gormley said.

"That is a contingency that exists in extremis and you rule nothing in and nothing out, you're a fool if you do at this stage.

"What I can say is in terms of the overall resilience of Police Scotland, as a single national force we have got well-established protocols around this, we know how to do it and because of the investments that have been made and the scale of our organisation, we have sufficient firearms capability to meet all foreseeable threats and demands going forward."

The chief constable said security arrangements around upcoming events such as the Scottish Cup Final, the visit to Scotland of former US president Obama, the Edinburgh Marathon and the Lisbon Lions memorial events in Glasgow had been reviewed to ensure they were "fit for purpose".

"I am confident that the arrangements that we have in place around those significant events will provide a safe and secure environment for those to take place in," he said.

Mr Gormley reassured the board that police business was continuing as usual and there had been no noticeable increase in community tensions or hate crime.

He added while demand levels into control rooms had remained broadly static, "there has been a predictable increase in suspicious reports to us and I would encourage that because if people see things that are causing them concern, please tell us".