At least 17 people, mostly teenagers, were killed and 50 more wounded when a student went on a shooting spree in his high school in Russia-annexed Crimea on Wednesday, Russian authorities said. Russian investigators identified 18-year-old Vladislav Roslyakov as the attacker, saying he fatally shot himself after the rampage in Kerch, a city in the east of Crimea, which Russia seized from Ukraine four years ago. Reports had initially described the attack as involving explosives with possibly terrorist motives. Russian investigators had initially opened a terrorism probe into the attack, but later changed it to murder. “A preliminary examination of...