Turkey rejects referendum challenges as activists detained

Turkey's election authority on Wednesday rejected opposition requests to cancel a referendum that boosted President Recep Tayyip Erdogan's authority as police detained activists over street protests following the contested poll.The controversy has stoked further political tensions over the rule of Erdogan, who has dominated Turkey since becoming premier in 2003 then president in 2014.The main opposition Republican People's Party (CHP) and the pro-Kurdish Peoples' Democratic Party (HDP) had on Tu