KYIV, Ukraine (AP) — At least seven people were killed after Russia launched a barrage of drones across Ukraine overnight on Sunday, according to local Ukrainian officials and emergency services. Sunday’s overnight attacks occurred ahead of expected ceasefire negotiations in Saudi Arabia in which Ukraine and Russia are expected to hold indirect U.S.-mediated talks. Extended sounds of explosions were heard in the early hours of the night across Kyiv as the air raid blared for over five hours. Russian drones and debris from shot-down drones, which were flying at lower altitudes to evade air defenses, fell on residential buildings across the Ukrainian capital