At least 30 garments worker were injured as they clashed with police at Natun Bazar of Sreepur blocking Dhaka-Mymensingh highway on Sunday.
Police fired nine gun shots and 20 tear shells to disperse the workers from the highway.
The workers also vandalised machine, furniture and computers inside the Asrotex factory alleging that its owner had hired musclemen to attack the workers.
One of the directors of the factory Mirza Anisur Rahman rejected the allegation.
He said the factory was closed after the violence and he would have no other option but to announce lay off if the situation continues, reports the correspondent in Gazipur.
Gazipur industrial police inspector Helal Uddin said police fired nine gun shots and 20 teargas shells to disperse the workers as their blockade caused severe traffic congestion on the highway.
Reports from other apparel hubs in Gazipur, Savar, Ashulia and Narayanganj said the workers had joined their works on the day after a weeklong violent protest for raising their minimum monthly wage to Tk 8,100.
-With New Age input
