ISTANBUL (Reuters) -Turkish authorities have captured two gunmen who shot one person dead on Sunday during a service at a church in Istanbul and who are believed to be tied to Islamic State, Interior Minister Ali Yerlikaya said. Yerlikaya had earlier said that the attack, which Ankara condemned, took place around 0840 GMT at the Italian Santa Maria Catholic Church in Istanbul's Sariyer district, and that one Turkish citizen - who was targeted by the gunmen - was killed while attending the servic