A bus in which the rallyists were returning to their native Madhubani district from the state capital collided with a truck on NH-57 near Maithi village in which two passengers were killed on the spot and ten others injured, Gaighat police station in-charge Sanjay Pathak said.
The injured were taken to Sadar hospital and efforts were on to ascertain the identity of the victims, he said.
In a separate accident, 15 rallyists sustained injuries after a Khagaria-bound minibus lost control and rammed into road divider before overturning at Harhar Mahadev chowk on NH-31 in Begusarai district, Deputy Superintendent of Police Rajesh Kumar said.