Union leader Ko Nyi Nyi Su, Hmawbi Township Union President, affiliated to Myanmar Industry Craft Service-Trade Union Federation (MICS-TUsF), was arrested on February 18, 2021. After the court hearing on March 4 he was sent to the notorious Insein Prison. The arrest is seemingly part of a crackdown on trade unionists and raids at union offices and factories in Myanmar after the military coup. Union organisers have been vocally requesting unpaid wages, organising protests and opposing the regime and its financiers.

On 26 June 2023, Ko Nyi Nyi Su was due to be released after serving a two-year prison sentence. Instead of being released, he was abducted by the military.