Serbian President Aleksandar Vucic accused Ukraine and an unidentified EU country of being behind a series of hoax bomb threats against Air Serbia planes. Since Russia launched its brutal invasion of Ukraine in late February, more than a dozen Air Serbia flights have been forced to return to Belgrade or Moscow due to bomb threats, and Belgrade’s airport was evacuated at least three times. “Foreign [intelligence] services of two countries are doing that. One is an EU country, and Ukraine is the another one,” Vucic said late on Sunday, without providing evidence. In a statement, Oleg Nikolenko, …