Joint forces arrested 343 people under 'Operation Devil Hunt' across the country on the second day of the operation.
It brings the total arrested on the first two days of the operation till Monday afternoon to 1651, said sources at the police headquarters.
Of them, 1178 were arrested in connection with different cases against them, it said.
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During the second day's operations, the joint forces also recovered arms and ammunition including one pistol, two magazines, 11 rounds of bullets, six cartridges, three knives, three swords, an axe, ten cocktails, one stick, four iron rods and four sharp weapons.
Earlier, the joint forces arrested 1,308 people on the first day of the operation.
The government launched the nationwide security operation on Saturday night, ostensibly aiming to curb unrest and ensure public safety. The context in which it came about, however, suggested a particular focus on supporters and activists of the Awami League, including its banned student front, the Chhatra League.
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The operation was devised following Friday night's attack on students and civilians in Gazipur, a traditional den of the Awami League.
Meanwhile, Home Affairs Adviser Lt Gen (retd) Md Jahangir Alam Chowdhury said on Sunday that the countrywide crackdown âOperation Devil Huntâ would continue until the devils are eradicated.