A reliable source yesterday told The Daily Star that the measure was taken after intelligence agencies were informed that Hawa Bhaban spokesman Ashik and Tarique Rahman's close aides Mia Nuruddin Apu and Shakil had been hiding inside Khaleda's house.

Four security personnel were seen standing at the entrance of the house at about 5:30pm yesterday.

Ashik, Apu and Shakil might have taken shelter in the house to evade arrest during the ongoing drive by the joint forces, said the source.

The three are known for their controversial activities during the last five years of the BNP-led alliance government's rule.

It is alleged that Khaleda's eldest son Tarique Rahman is one of the beneficiaries of the activities of these three.

Security personnel on Tuesday detained two of Tarique Rahman's aides and have also been looking for others. Ashik, Apu and Shakil are three of them, said the source.