Nepal pushed further into political turmoil over voting on a new constitution

Nepalese opposition lawmakers shout slogans inside the Constituent Assembly in Kathmandu, Nepal, Sunday, Jan. 25, 2015. Nepal's ruling coalition on Sunday took a step toward drafting a new constitution, angering the opposition and pushing the Himalayan country further into political turmoil. (AP Photo/Niranjan Shrestha) (The Associated Press)

Nepalese opposition lawmakers shout slogans as they walk out of the Constituent Assembly in Kathmandu, Nepal, Sunday, Jan. 25, 2015. Nepal's ruling coalition on Sunday took a step toward drafting a new constitution, angering the opposition and pushing the Himalayan country further into political turmoil. (AP Photo/Niranjan Shrestha) (The Associated Press)

Nepalese Prime Minister Sushil Koirala, center, arrives to attend a meeting of the Constituent Assembly in Kathmandu, Nepal, Sunday, Jan. 25, 2015. Nepal's ruling coalition on Sunday took a step toward drafting a new constitution, angering the opposition and pushing the Himalayan country further into political turmoil. (AP Photo/Niranjan Shrestha) (The Associated Press)

Nepal was pushed further into a political turmoil over a draft of a new constitution with an opposition alliance vowing street protests.

The opposition was angered by the parliament speaker announcing Sunday a governing parties-backed proposal committee that would proceed with voting on the constitution.

The opposition parties are demanding the draft be prepared by consensus and not just by the ruling coalition that has an overwhelming majority in the assembly.

Security was stepped up Sunday in parliament with rows of security personnel blocking the protesting opposition members when Speaker Subash Nemwang made the announcement.

Nepal has struggled to draft a new constitution since 2008.