ISTANBUL (Reuters) -Turkish President Tayyip Erdogan, who has objected to Sweden and Finland joining NATO, held phone calls with the leaders of the two countries on Saturday and discussed his concerns about terrorist organisations. Turkey says Sweden and Finland harbour people linked to the Kurdistan Workers Party (PKK) militant group and followers of Fethullah Gulen, whom Ankara accuses of orchestrating a 2016 coup attempt. Erdogan told Sweden’s Prime Minister Magdalena Andersson that Ankara expected concrete steps to address its concerns, according to the Turkish presidency. He also said an …