BELGRADE, Serbia (AP) — A gunman killed eight people and wounded 14 in two villages in Serbia, authorities said, shaking a nation still in the throes of grief over a mass shooting at a school a day earlier. Police arrested a suspect Friday after an all-night search. Serbian President Aleksandar Vucic called the shootings late Thursday an attack on the whole nation . Vucic said the suspect wore a T-shirt bearing a pro-Nazi slogan, but he did not speculate about the motive. Police said the suspect was a man born in 2002. The slayings came a day after a 13-year-old...