Seven people were killed and five others injured Thursday when a passenger train and bus collided at a railway crossing near the town of Nove Zamky in southern Slovakia, rescuers said.

"Seven people suffered injuries incompatible with life," the Slovak rescue service said, updating a previous toll of six dead. "Five people were injured," it added on Facebook.

The express train carrying more than 100 passengers from Prague to Budapest crashed into a bus shortly after 5 p.m. local time. The collision caused a fire on the scene, interrupting traffic on the track.

Railway spokeswoman Vladimira Bahylova told AFP the driver of the train "suffered burns because the locomotive caught on fire."

Slovak Interior Minister Matus Sutaj Estok later traveled to the scene of the incident. He told reporters it was not clear whether the cause was a technical or human failure.

(With input from agencies)