Dhaka, Nov. 8 -- Police have been accused of firing sound grenades to disperse a procession of government primary school teachers in Dhaka.

The teachers, who have been demanding that their pay be upgraded to the 10th grade along with two other benefits, were marching towards Shahbagh on Saturday when police blocked their way.

Witnesses and organisers said that when the protesters refused to turn back, officers fired sound grenades near Shahbagh Police Station to break up the crowd. Several teachers were reportedly injured.

After being stopped, the demonstrators returned to the Central Shaheed Minar, where they have been staging a sit-in since the morning.

Mohammad Shamsuddin Masud, convenor of the Primary Teachers' Demand Implementati...