Tension is growing in the Thai capital Bangkok as thousands of anti-government protesters occupy the city's two main airports for a seventh day.
Police said they were negotiating with the group as experts warned of soaring economic losses from the blockade.
Some 100,000 passengers remain stranded in Bangkok while efforts are being made to find alternative airports.
Meanwhile, thousands of government supporters held their first rally in the capital since the blockade began.
People were pushing and cutting into the line because they were afraid of missing their flights
Farah Uddin BBC News website reader at U-Tapao relief airport
The opposition want the government to resign, accusing it of being corrupt, hostile to the monarchy and in league with exiled former Prime Minister Thaksin Shinawatra.
Fears of clashes between pro- and anti-government groups have grown since a new grenade attack on opposition supporters in Bangkok on Saturday night, which injured about 50 people, three of them seriously.
So far the two sides have not encountered each other but there are fears of serious violence if they do, the BBC's Jonathan Head reports from Bangkok.
There is little sign that the tens of thousands of tourists stranded in Bangkok will get home any time soon, the BBC's Quentin Somerville reports from Bangkok's international airport.
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