At least 12 trucks loaded with sands and bricks were placed on two sides of BNP chairperson Khaleda Zia's Gulshan office in the capital from Sunday midnight as
BNP chief said they will carry out their scheduled programme despite the police ban on gatherings.
Sources said, trucks were kept there from midnight.
A large number of law enforcers cordoned off the office where she has been kept under high surveillance since Saturday midnight.
Police also barring anyone from entering Khaleda’s office since morning.
Speaking to BBC Bangla on Sunday night, the BNP chief said they would carry on as planned despite the police ban on gatherings.
Khaleda also told BBC Bangla that the government was afraid that the nation would stand behind her.
The BNP chairperson has been kept confined to her office since Saturday night as she threatened to hold mass rallies in Dhaka to mark 'Democracy Killing Day' on Monday, the first anniversary of the last parliamentary polls that her BNP and its allies boycotted.