Nepalese authorities have warned Tibetan groups against holding protests to mark this week's anniversary of the 1959 rebellion against China's rule in Tibet, an official said Sunday.

Extra security will also be deployed on the capital's streets to shut down any protests on Tuesday for the 56th anniversary of the failed uprising, Kathmandu's chief district officer Ek Narayan Aryal said. 

Kathmandu's international airport reopened late Saturday, ending a four-day shutdown after a plane skidded off its only runway which left thousands stranded at the start of a busy tourist season.

Nepalese and Indian experts worked for days to help remove the damaged Turkish Airlines A330 after it veered off the runway with 224 passengers on board early Wednesday.

The U.N. human rights chief Thursday hailed Nepal's top court for barring war crimes commissions from offering amnesty to soldiers and former Maoist rebels in cases involving serious rights abuses.

Nepal is in the process of setting up two bodies to investigate war crimes committed during a decade-long insurgency, which saw security forces and Maoist guerrillas accused of carrying out torture, killings, rape and "forced disappearances".

A Turkish Airlines plane carrying 224 passengers had to be evacuated after it skidded off the runway on landing at Kathmandu airport on Wednesday and ended up on grassland.

Nepal aviation officials said no one on board was injured, although one witness described how terrified passengers leaped from their seats as the cabin filled with smoke after the plane skidded to a halt.

Nepal's top court on Thursday said two bodies set up to investigate war crimes committed during the country's decade-long civil conflict would not be able to grant amnesty for serious rights abuses.

Former Maoist rebels and security forces have both been accused of carrying out torture, killings, rape and "forced disappearances" during the civil war, which ended with a peace agreement in 2006.

Two teenage Nepalese schoolgirls suffered burn injuries after a boy hurled acid at them early Sunday, police said. 

The girls, aged 15 and 16, were admitted to a hospital with burn injuries after the youth attacked them with a bottle of acid.

Nepal's parliamentary speaker Sunday announced plans for a vote on a new national constitution to end a political deadlock, sparking fresh anger from opposition lawmakers.

The ruling and opposition parties have spent years locked in a stalemate over the terms of a constitution designed to draw a line under a decade of civil war.

Protests by Nepal's opposition lawmakers threw parliament into chaos Friday after emergency talks failed to secure agreement on a new national constitution before a midnight deadline expired.

As parliament opened, opposition lawmakers led by former Maoist rebels shouted slogans and stormed into the well of the main chamber, refusing to allow ruling party politicians to propose a vote on disputed issues in the charter.

Nepal's Maoist chief apologized Wednesday for his party's role in a parliament brawl that injured four security officers in the tense run-up to a deadline for a post-war constitution.

Maoist lawmakers hurled chairs and scuffled with security staff early Tuesday as ruling party politicians tried to push proposals for a new charter through parliament before Thursday's deadline.

Nepalese police clashed Sunday with activists campaigning for the country to be declared a Hindu state, as tensions rose before Thursday's deadline for publication of a post-war constitution.

Thousands of supporters joined a rally organized by the pro-royalist Rastriya Prajatantra Party-Nepal (RPP-N) near Kathmandu's constituent assembly building, where top political leaders were meeting to try to agree on the new constitution.