YANGON (REUTERS) - Opponents of Myanmar's coup protested again on Saturday (March 20) as international pressure on the military junta to halt its repression of pro-democracy supporters increased, with Asian neighbours joining Western countries in condemning lethal force.

A young man was shot and killed in one of the most turbulent neighbourhoods of the main city of Yangon, a resident and media reported, taking the death toll since the Feb 1 coup to 238, according to a tally by the Assistance Association for Political Prisoners activist group.

The bloodshed has not quelled public abhorrence for the return of military rule and anger over the ouster of the elected government and the detention of its leader Aung San Suu Kyi.

But some activists say they have had to adapt tactics.

"We protest where there are no police or military, then when we hear they're coming, we disperse quickly," campaigner Kyaw Min Htike told Reuters from Dawei in the south before he and others staged a brief rally outside the town centre.

"I don't want to lose a single one of my comrades but we'll protest any way we can until our revolution prevails."

Sometimes groups gather at night with candles and placards, then melt away after taking photographs.

People also stage "unmanned" protests, with rows of placards with messages like "We will never stop until we get democracy" set up on a street.

On Saturday, dozens of protesters gathered in the second city of Mandalay. Several were injured when a vehicle drove into them and when police fired rubber bullets, a city news portal reported. It was not clear why the vehicle hit the protesters.

There were small protests in other towns, including Kyaukme and Hsipaw in the north-east, Hpa-an and Myawaddy in the east, Labutta in the Irrawaddy river delta, Myeik in the south and the central town of Yay Oo, according to news portals and social media images.

Hundreds marched in the town of Monywa and burned a copy of the 2008 constitution, which was drafted under military supervision and limits the political role of civilians, the Irrawaddy news portal reported

UN Secretary-General Antonio Guterres on Friday condemned what he denounced as the military's continuing brutal violence.

A "firm, unified international response" was urgently needed, his spokesman quoted him as saying.

UN rapporteur Tom Andrews called for sanctions to what he called the generals' ruthless attacks on the people.

"The world must respond by cutting their access to money and weapons. Now," he wrote on Twitter.

The US House of Representatives approved legislation condemning the coup and lawmakers decried the increasingly harsh tactics against the demonstrators.

The authorities have tightened restrictions on Internet services, making information increasingly difficult to verify, and clamped down on private media.

Facebook has banned all pages linked to the military over guidelines on inciting violence.

On Saturday, Twitter said it had suspended the information ministry's page under the company's "platform manipulation and spam policy". The ministry has been posting news daily.

Asian anger

Western countries have repeatedly condemned the coup and the violence. Asian neighbours, who have for years abided by a code of not criticising each other's problems, have also begun speaking out.

Indonesian President Joko Widodo, in some of the strongest comments yet by a regional leader, said he would ask Brunei's Sultan Hassanal Bolkiah, the chairman of Asean, to call an urgent meeting.

"Indonesia urges that the use of violence in Myanmar be stopped immediately so that there are no more victims," Mr Widodo said in a virtual address. "The safety and welfare of the people must be the top priority."

Backing Indonesia's call for a meeting, Malaysian Prime Minister Muhyiddin Yassin said he was appalled by the persistent use of lethal violence against unarmed civilians.

Philippine foreign minister Teodoro Locsin said that Asean had to act. Singapore has also spoken out against the violence and the coup that triggered it, calling for the release of Ms Suu Kyi.

But the military has shown no sign of being swayed and has defended its takeover, which derailed a slow transition to democracy in a country that has been ruled by the army for most of its post-independence history.

It says a Nov 8 election won by Ms Suu Kyi's National League for Democracy was fraudulent and its claims were ignored by the electoral commission. It has promised a new election but not set a date.

Ms Suu Kyi, 75, faces accusations of bribery and other crimes that could see her banned from politics and jailed if convicted.

Her lawyer says the charges are trumped up. The Nobel peace laureate, who has campaigned for democracy in Myanmar for three decades, is being held at an undisclosed location.