Rapid Action Battalion (Rab) has detained three people, including the wife of prime suspect Faisal Karim Masud, in connection with the shooting of Sharif Osman Hadi.

The detentions were made in separate raids across Dhaka and Narayanganj over 24 hours, Wing Commander MZM Enthekhab Chowdhury, director (legal and media wing) of Rab, told The Daily Star.

The detainees are Faisal's wife Samia, his friend Monika, and his brother-in-law Shipu, he said.

The Rab official said Faisal had been in contact with all three before and after the shooting.

He added that Faisal stayed with his wife in Narayanganj on the night before the incident and left for Dhaka at dawn, where he went to his friend Monika's residence.

Hadi, an aspiring candidate for the Dhaka-8 constituency and spokesperson of Inquilab Moncho, was shot in Dhaka's Paltan area on Friday noon.