Myanmar airlines aircraft.

Myanmar’s government agency has suspended all passenger flights in the country.

The US Embassy in Myanmar said on its Facebook page that the road to the international airport in Yangon, the country’s s biggest city, had been closed Monday.

On Twitter, it said that reports indicate that all airports in Myanmar are closed.

The US Embassy also issued a security alert saying it was aware of the detention of Myanmar’s leader Aung San Suu Kyi as well as the shutdown of some Internet service, including in Yangon.

There is potential for civil and political unrest in Burma, and we will continue to monitor the situation, it said, using Myanmar’s former name.

The US State Department earlier issued a statement saying it was alarmed by Monday’s military takeover.

China said it was still gathering information about Monday’s developments in Myanmar.

China is one of Myanmar’s most important economic partners and has invested billions of dollars in mines, infrastructure and gas pipelines in the Southeast Asian nation.

Foreign Ministry spokesman Wang Wenbin said at a daily news briefing: “We have noted what happened in Myanmar, and we are learning the further situation now,”

Myanmar’s military has announced it will hold a new election at the end of a one-year state of emergency it declared Monday when it seized control of the country and reportedly detained leader Aung San Suu Kyi.