Two 15-year-old girls are thought to be among nine people arrested during a demonstration at the Faslane nuclear submarine base on the Clyde.
A number of teenagers are thought to have been arrested
The protesters were taking part in a year-long campaign against the UK Government's plans to renew the Trident nuclear system.
They had blocked the north gate entrance to the naval facility.
The campaigners also glued their hands together in a bid to stop police officers from removing them.
It is believed the five men and four women arrested on Saturday were of various nationalities including Welsh, German and Belgian.
The Faslane 365 group said two of those involved were 15 and one was 16.
They were supported by other protesters including an "international clown army" and a "teddy blockade".
There was also dancing and music from Japanese students and a speech from a Hiroshima survivor.
The protesters claim the action takes the number of arrests since the Faslane 365 campaign began in October 2006, to more than 900.