Beijing has issued its first red alert for air pollution under a four-tier emergency response system created in October 2013.
Myanmar government has placed Yangon region under high security alert ahead of historical general elections scheduled for Sunday.
South Korea's foreign ministry expanded its travel alert to an entire region of Thailand, which has been plagued by the six-month-long anti-government protest.
Beijing on Monday maintained its orange pollution alert, the second-highest alert level, as severe smog is forecast to linger in the Chinese capital for another three days.
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