Bangladeshi politicians and academics, including Bangladesh’s home minister, received death threats on Tuesday from Ansarullah Bangla Team.
Less than two weeks ago, the group also sent a letter with a hit list of 10 people, including a prime minister’s adviser, the University of Dhaka’s Vice Chancellor and secular activist and blogger Imran H Sarkar.
State Minister for Home, Asaduzzaman Khan Kamal, was among the public figures who was named on a hit list which was made by the banned group.
Kamal said death threats sent from the Al-Qaeda linked group, who previously claimed responsibility for attacks against Atheist bloggers in the country since February.
"We are looking into the matter and on the move to find them," police inspector Noor-e-Azam Mia said.
Bangladeshi police have detained 15 people recently over suspicions of recruiting for ISIS.
"Our police have stopped an attempt at forming a branch of ISIS in Bangladesh. The terrorist attempting to set this up was a member of the Ansarullah Bangla Team, which we also banned last week," said Prime minister Sheikh Hasina’s son, Sajeeb Wazed, on his Facebook profile.
The Ansarullah Bangla Team was banned by the Bangladeshi government for allegedly killing three bloggers.
The group has also been charged with the murder of the blogger Ahmed Rajib Haider in 2013.