Kathmandu (PTI): At least two bombs were exploded in the office premises of the International Organisation of Migration in Damak, an eastern Nepal town that has been facilitating the resettlement of the Bhutanese refugees.

The blasts on Monday evening caused minor damage to the office but nobody was injured, police said.

No one has so far claimed responsibility for the blast.

Police, however, suspected the involvement of underground groups operating inside the refugee camps who are against the third country resettlement programme.

The underground groups including the militant Bhutan Communist Party - Marxist Leninist Maoist, had earlier demanded a halt to the resettlement programme saying it is a kind of 'human trafficking.'

The US has offered to take some 60,000 Bhutanese refugees out of a total 107,000 refugees settling in seven camps in eastern Nepal. Other countries including Canada, Australia, Denmark, New Zealand, Netherlands, Norway have also expressed interest in the resettlement of the refugees.

Hundreds of refugees have already left for USA under the third country resettlement programme and the UN Refugee Agency UNHCR expects within next few months the number of those leaving Nepal for resettlement would reach 2,000 each per month.