Burma's president has suspended construction of a controversial Chinese-backed hydroelectric dam.
In a letter read out in parliament on Friday, Thein Sein said the $3.6bn (£2.3bn) Myitsone dam was contrary to the will of the people.
The project fuelled fighting between the army and ethnic Kachin rebels.
Pro-democracy leader Aung San Suu Kyi, who recently joined the anti-dam campaign, welcomed the move, seen as a rare victory for social activists.
The BBC's South East Asia correspondent Rachel Harvey says it appears to be further evidence of the new leadership's desire to seek legitimacy by being more open to public opinion.
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