Dhaka, Sept. 26 -- Police have raided the main office of the Jatiya Samajtantrik Dal (JaSaD) in Dhaka's Gulistan.

The operation began around 3pm on Saturday, Sub-Inspector Nazmul Hossain, who was at the scene, told bdnews24.com.

"Police received the information around 3pm and went to the third floor, where they found them at the JaSaD office. They were holding a meeting here," he said.

Nazmul said nearly 400 people were inside and were being detained and taken away.

DMP Deputy Commissioner for Media and Public Relations Md Akhtar Hossain told bdnews24.com around 4:15pm that police had learned that "Joy Bangla" slogans were shouted outside the office while a meeting was under way inside.

"Police went to the scene and are taking people...