Guwahati, Dec 13 (IANS) At least four soldiers were injured Wednesday when a landmine, suspected to be planted by militants of the outlawed United Liberation Front of Asom (ULFA), exploded in Assam's Sivasagar district.

Police said the army vehicle hit the landmine near village Mahmora, about 370 km from here.

"The vehicle was badly damaged in the explosion," a senior police official said.

The injured were shifted to a hospital in Sivasagar. The condition of one of the soldiers was stated to be serious.

"A team of police and army soldiers was going in separate vehicles to defuse a bomb planted beneath an oil pipeline. The army vehicle was blown up as soon as it went over a culvert. The police vehicle was a little behind when the blast took place," the official said.

Police said the blast was the handiwork of the ULFA. "There is no doubt that the explosion was the handiwork of the ULFA," army spokesperson Col Narender Singh said.

On Friday, five policemen were killed in a landmine explosion in the eastern Dibrugarh district. The ULFA is blamed for a wave of bombings in Assam since the past two months in which more than 30 people have been killed and 130 injured.