Two separate accidents involving road vehicles and oncoming trains resulted yesterday in the deaths of three people in northern Greece, despite the railway crossings having barriers and being fully marked, authorities said. Two people, whose identities were not released, were killed in Nea Ionia, Thessaloniki, at about 11 a.m. when their vehicle was crushed by a train traveling from Serres to Greece’s second-largest city. Authorities said that the crossing was protected by metal bars and that the light and sound system, warning drivers of the oncoming train, was fully operational. Some two hours later, the driver of a small truck was killed near Kilkis when his vehicle was hit by a train on the Istanbul-Thessaloniki route. There were no injuries reported among passengers on either of the trains.