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Celtic have signed Norwegian midfielder Kristoffer Ajer on a four-year deal from IK Start.
The 17-year-old had a trial with the reigning Scottish Premiership champions in January and after impressing officials he returned to Glasgow on Tuesday to hold talks over a possible deal.
He has signed a four-year contract to join Celtic in June, which will run until the summer of 2020.
"I'm really happy. I enjoyed it last time," Ajer told reporters when he arrived at Glasgow Airport on Tuesday.