The BNP had announced a ‘black flag display’ rally at the party headquarters in Dhaka’s Naya Paltan to demand the release of party chief Khaleda Zia.
BNP activists began gathering in front of the offices on Saturday morning for the demonstration, which was to start at 11am.
Around 10:30am, several hundred party activists had begun a sit-in with black flags in front of the offices, chanting slogans to demand Khaleda’s freedom.
A large deployment of police and plainclothes detectives had taken up positions in the area with water cannons and armoured vehicles.
The police began a baton charge as soon as the BNP activists had occupied the road. They also used coloured water blasted from the water cannons.
Police detained 11 activists and put them on police vans.
The BNP secretary general and other leaders were struck by the coloured water and are currently inside the party offices. Activists are chanting slogans from inside.
Police have also destroyed the displays from the protest. Abandoned black flags are littering the streets as police search for BNP activists in the nearby alleyways.
“A protest cannot be peaceful if it occupies the road and halts traffic,” Dhaka Metropolitan Police Motijheel Division Deputy Commissioner ASM Shibli Noman told the media at the scene. “So we took action.”