Protesters opposed to Myanmar's military coup defied bans on big gatherings to extend the largest demonstrations in more than a decade on Tuesday, chanting and confronting police who fired water cannons and arrested more than two dozen people.

The Feb 1 coup and detention of elected civilian leader Aung San Suu Kyi has brought four straight days of protests across the Southeast Asian country of 53 million and a growing civil disobedience movement affecting hospitals, schools and government offices...