A team of Federal Bureau of Investigation (FBI) of the US has met the DB officials.
The meeting was held at DB headquarters on Sunday afternoon.
Deputy Commissioner of DB Mahbubey Alam briefed media after the meeting.
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He said: "A three-member FBI team came to Bangladesh for a regular meeting regarding Avijit murder case. The team expressed interest to help DMP probe into the murder of blogger Niloy if the police seek their help."
The DB official, however, said any formal procedure is yet to be done with the FBI team for its assistance.
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Also known as Niloy Neel on blogging platforms and Facebook, Niladri Chatterjee was killed with machetes by four unidentified assailants at his Goran residence in Dhaka around 1:30pm Friday.
Niloy, who worked at an NGO, had rented the flat on the fourth floor of a building in the area two years back, identifying himself as a Muslim named Niloy Chowdhury. He used to stay with his wife Ashamoni and sister-in-law.
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Recently he was trying to leave the country out of fear as three secularist activists had been killed by the militants since February. He also received threats several times.
A group named Ansar Al Islam, believed to be banned militant group Ansarullah Bangla Team, has claimed responsibility for the murder. In an email sent to the media in the afternoon, they said that Niloy had been killed for his blasphemous activities, and warned others of similar consequences for demeaning the Almighty and the Prophet.