Nicola Sturgeon said the authorities cannot be sure there are no other Scots affected.
Hundreds Gather At Vigil For Paige
Hundreds of people have turned out at a local park to remember Clydebank teenager Paige Doherty.
The memorial event at Whitecrook Park in the West Dunbartonshire town was arranged by friends of the 15-year-old who went missing last Saturday.
Her body was found two days later in bushes at the side of Great Western Road.
A man has appeared in court charged with murder.
Around 300 people, many carrying pink balloons, gathered on Saturday night to pay tribute to the teenager, described as the "most outstanding, amazing girl''.
Some of Paige's friends thanked the crowd who had turned out in the wind and rain to take part in the event.
One girl said: "Paige was so beautiful, everything about her you just wouldn't change. For that to get taken away from us was absolutely heart-breaking.''
Another added: "I just can't believe she has gone, it hasn't sunk in. There's only one star in the sky tonight and it's obviously Paige looking down on us.''
Songs were played as those gathered stood to remember the schoolgirl, including Coldplay's Yellow and a version of Snow Patrol's Chasing Cars.
A minute's silence was then held before people tied balloons to the park's railings and lit candles.
Many flowers were also laid at the scene, with pink balloons left at the entrance to the park spelling out the teenager's name.
Posters held up by friends included one reading "fly high princess''.
John Leathem, 31, made no plea during a private hearing at Dumbarton Sheriff Court on Saturday when he was charged with murder. He was remanded in custody.
Family members say Laura Macintyre and Eilidh MacLeod haven't been heard from since the explosion.
The families of two girls from the Western Isles missing after attending the concert in Manchester targeted in a terror attack have issued appeals on social media.
Crews were called to the former Royal Victoria Hospital site this afternoon.
Most Viewed Pictures On Heart
Recently Played Tracks
To listen live, choose your preferred station:
Now playing: The best feel good music
Deposit £10 to get a £40 Welcome Bonus - That's £50 to play bingo, slots and more!*
Over 50 tracks to make you feel-good. New album out now...
Find your local four day weather report here.
Make Heart the soundtrack to your day and you could be a winner with great prizes up for grabs throughout the day.
Find out more about some of the companies advertising on Heart Scotland- East.