Suu Kyi's extended detention is likely to further inflame tensions between the military and the protesters who have taken to the streets of cities across the Southeast Asian nation seeking the return of the government they elected.

Some carried banners against the military that read: "They kill in (the) day. They lie on TV".

It is just one of many parts of the charter that ensured the military could maintain ultimate control over the country it ruled for 50 years following a 1962 coup.

Monitoring group NetBlocks initially said the "state-ordered information blackout" had taken Myanmar nearly entirely offline.

Myanmar's new military government yesterday warned the public not to harbour fugitive activists after issuing arrest warrants for veteran democracy campaigners supporting big anti-coup protests. "Social media is very quiet now", she tweeted ON Monday.

The security forces fired to disperse protesters outside one plant in Kachin's state capital Myitkyina, footage broadcast live on Facebook showed, although it was not clear if they were using rubber bullets or live fire.

On Monday, more than a dozen police trucks with four water cannon vehicles were deployed near the Sule Pagoda in central Yangon, which has been one of the main sites for protests in the commercial capital.

In a special session at the Human Rights Council in Geneva, the original resolution presented by Britain and the European Union was revised to remove calls to bolster the ability of a United Nations rights expert to scrutinize Myanmar and for restraint from the country's military.

Suu Kyi, 75, won the Nobel Peace Prize in 1991 for campaigning for democracy and spent almost 15 years under house arrest.

Local media outlets said at least five journalists monitoring the protest had been detained and published pictures of some people wounded in the incident.

Through his spokesman, Guterres also asked the military to "urgently" allow Swiss diplomat Christine Schraner Burgener to visit Myanmar "to assess the situation first hand".

There was no official word as to why, but the U.S. embassy in Myanmar urged American citizens to "shelter in place", citing reports of the military movements in Yangon. Senior General Min Aung Hlaing, who led the coup, promised last week in a nationally televised speech that new elections would be held to bring a "true and disciplined democracy", but did not specify when they would take place.

Her period of detention was expected to expire on Monday, however her lawyer was not contactable and the generals had given no indication that she would be released. Her lawyer, however, was not contactable and the generals have given no indication that she would be released.

Security forces have stepped up arrests of doctors and others joining a civil disobedience movement that has drawn huge crowds in urban centres and frontier villages.

In Dawei, seven police officers broke ranks to join anti-coup protesters, mirroring local media reports of isolated defections from the force in recent days.

Striking workers who spearheaded the campaign are among at least 400 people to have been detained since the coup, the Assistance Association for Political Prisoners monitoring group said.

As well as the demonstrations around the country, the military is facing a strike by government workers, part of a civil disobedience movement that is crippling many functions of government.

She has been on life support in a hospital in the capital, and unofficial memorial services were held for her Sunday at protests in Yangon and Mandalay, the country's two biggest cities.

"We don't trust anyone at this time, especially those with uniforms", said Myo Ko Ko, member of a street patrol in Yangon.

She told a special session of the Human Rights Council that for over 20 years, "successive high commissioners and many eminent experts have briefed this council, and its predecessor, on violations committed by the country's military", adding that a lack of action has "emboldened military leaders and contributed to this present crisis". The junta insists it took power lawfully.