Baku, January 25, AZERTAC Celtic have signed South Korea striker Hyeon-Gyu Oh from Suwon Bluewings for £2.5m on a five-year deal, according to Sky Sports.The 21-year-old verbally agreed personal terms earlier this week and has now completed his move to the Scottish Premiership champions.Celtic manager Ange Postecoglou said: "He is a young, talented striker with great attributes and someone who is ready to take the next stage in his career - a player who is hungry, eager to develop and to achieve success.”