PATNA, India — Indian Maoist rebels killed 14 people in two separate attacks in the central state of Chhattisgarh on Saturday, continuing a campaign of violence aimed at disrupting the five-week national elections.

Five election officials and two bus drivers were killed when a land mine exploded under their vehicle in the state’s Bijapur district, where voting is scheduled to take place this week, said A. N. Upadhyay, the state director general of police.

After the explosion, the rebels opened fire at the bus. Five people were also wounded in the attack and were being treated in a hospital, Mr. Upadhyay said. The rebels fled into the surrounding forest when paramilitary forces began firing back.

In another attack on Saturday, the rebels killed five paramilitary soldiers and two civilians in an ambush on the soldiers’ vehicle in the remote Darbha Forest in the southern part of the state, said the police inspector general, R. K. Vij. Three soldiers were also wounded in that attack.