After results of the March election, in which the opposition party won, residents voted again on Sunday in what is widely being seen as a referendum on President Recep Tayyip Erdogan.
The Carter Center said the former president was preparing to go turkey hunting when he fell in his home. It added that he is now "recovering comfortably" after undergoing surgery.
Turkish election authorities have cancelled a major election victory for the country's main opposition party, according to Turkish state media. The Istanbul mayor's race will be re-run on June 23.
Turkey says the two unlikely allies — one a NATO member, the other a target of U.S. sanctions — have joined forces against the Kurdistan Worker's Party, or PKK.
Despite a rise in religious doctrine from the government, a recent survey shows a dip in the portion of people identifying as religious, compared with a poll in 2008.
The NBA star says he fears that if he travels to London for an upcoming game against the Washington Wizards, he might be killed for speaking out against Turkey's president.