Kathmandu - At least two crude bombs went off Monday outside a venue in the Nepalese capital where politicians are expected to meet on Wednesday to abolish the monarchy.

The blasts caused no casualties or damage to the building, the Kathmandu District Police office said.

Police quoted witnesses as saying the bombs were thrown from motorcycles at the gates of the Birendra International Convention Centre, which also houses the offices of the UN mission in Nepal.

Police said they recovered leaflets from the scene issued by a group calling itself GPF Ranvir Sena, which has carried out similar attacks for Hinduism to be reinstated as Nepal's official religion.

The blast came two days before the newly elected constituent assembly was due to vote on abolishing Nepal's 240-year-old monarchy. Analysts say the proposal is certain to be adopted by an overwhelming majority in the 601-member legislature.

Nepal was officially a Hindu Kingdom until April 2006. However, after King Gyanendra's government was toppled, politicians voted to turn the country into a secular state.

Nearly 80 per cent of the Nepalese population is Hindu. (dpa)