NEW : Official says sulfur , ammonia and sulfur trioxide may have caused the explosions . The cause of the blast is unlikely to have been a bomb , a police official says . Comment: An explosion early Thursday rocked a neighborhood in the city of Yangon killing 20 people and injuring more than 95 , Myanmar 's state-run television MR TV reported . The explosion occurs in a residential neighborhood of Yangon .
NEW : Official says sulfur , ammonia and sulfur trioxide may have caused the explosions . The cause of the blast is unlikely to have been a bomb , a police official says . Comment: The explosion occurs in a residential neighborhood of Yangon .