Security forces in Myanmar shot and killed at least 18 protesters on Sunday in the largest demonstrations since the military coup a month ago, according to the United Nations. Daily protests have been gaining speed as the military toughens its response with a more aggressive approach, using live ammunition and carrying out arrests. In the city of Dawei, in the southern part of the country, police opened fire on a large crowd, killing three and injuring more than 50 protesters. In Yangon, a 23-year-old was shot and in Mandalay, a 44-year-old died in hospital from gunshot wounds after he tried to flee police. On Feb. 1, the military ousted the civilian government led by Daw Aung San Suu Kyi.