Tuba Group Sramik Sangram (workers' action) Committee also announced that they would continue their hunger strike at the Shaheed Minar from 3 pm.
Law enforcers entered the factory premises around 1.15 pm. They lobbed tear gas canisters and charged batons on the workers, who were protesting demanding payment of their salaries and festival allowances due since July 28.
Police have also detained labour activists, including Garments Sramik Oikya Forum President Moshrefa Mishu and Bangladesh Trade Union Centre's Assistant General Secretary Jolly Talukder, who were with the workers at the factory.
Mishu' also the convener of Tuba Group Sramik Sangram Committee, announced the programme just before the police detained her, according to Taslima Akter, Coordinator of a labour body, Garments Sramik Shanghati.
"Mishu announced a three-point charter of programme before being detained.
"From now, a strike will go on for an indefinite period at all garment factories in Bangladesh," she told bdnews24.com.