KATMANDU, Nepal — Three of Nepal’s political parties called a second truce to stop pre-poll violence and pledged to abide by the verdict of the April 10 elections for an assembly that will decide the fate of the almost 240-year-old monarchy as five people were injured in two bomb attacks.

The Communist Party of Nepal (Maoist), the Communist Party of Nepal (Unified-Marxist Leninist) and the Nepal Communist Party (United Masal) signed an accord to curb violence, support free and fair elections, and honor the popular verdict.

Nepal is holding its first general elections since a November 2006 peace accord ended a decade-long insurgency by Maoist rebels who were fighting to overthrow the monarchy. Voters will elect a 601-member assembly that will draw up a new constitution to declare Nepal a federal republic.

One person was injured when a bomb was hurled in Baneshwar, in the heart of the capital Kathmandu, a police official said.

“Four others were injured when assailants threw a bomb on pedestrians in Birgunj,” which is located 50 miles south of Kathmandu, the senior superintendent of police, Surendra Bahadur Shah, said in a telephone interview. Two people are in critical condition.

The attacks are aimed at disrupting the election process, he said.

“We will stick to the peace process, it is time to prove our legitimacy through these elections,” the Maoist leader, Puspa Kamal Dahal, also known as Prachanda, told reporters in the capital, Kathmandu, today. “The Maoist party needs more credibility than anyone else in the elections.