Burma's military government deployed policemen at Buddhist monasteries Monday as it takes what it calls "effective action" after three weeks of anti-government protests.
Buddhist monks have been some of the most active and vocal demonstrators against military rule.
About 10 members of the opposition National League for Democracy say the government has cut their mobile telephone service.
Pro-democracy demonstrators have held a series of marches in Burma for nearly a month to protest a large hike in fuel prices.
The government says the hike was needed because of high world oil prices.
United Nations Secretary General Ban Ki-moon Monday called on the Burmese government to fully embrace democracy and respect the wishes of the international community, including freedom for detained opposition leader Aung San Suu Kyi.
Human Rights Watch Monday urged the U.N.'s Human Rights Council to take more action as the council begins its second year.
The group said in a statement Monday that continuing to ignore what it calls "grave" human rights abuses in places like Burma is unacceptable.
It also called the council's first year "disappointing."
Information for this report is provided by AP and AFP.