A militant suspected to be involved in the attack on Dhaka's Holey Artisan bakery killed himself during a raid on a hideout in Dhaka, media reports quoted Bangladesh police as saying.
The Dhaka Tribune said Bangladesh police captured three female militants from a hideout in Dhaka's Azimpur area last night, while another killed himself.
National police chief Shahidul Hoque said the man was identified as Abdul Karim and was suspected of being one of the attack's planners. Reuters said he was suspected to have rented a flat for the militants who carried out the attack.
Another official, Sanwar Hossain, was quoted as saying: "He killed himself inside the flat so that we can’t collect information from him through interrogation."
Police said the women also attacked and wounded five officers from the counter-terrorism unit. Police said the women used chilli powder, explosives and knives.
Police said one of the women could have been the wife of a man killed last week in a shootout. That man is believed to have trained the attackers.
The July attack which left 22 of the bakery's patrons dead was claimed by Islamic State; the Bangladesh government however blamed home-grown militants for the attack.
US secretary of state John Kerry, referring to the attack during a visit to Dhaka last month, said elements of Islamic state are ''connected'' to operatives in Bangladesh.
More than two dozen suspected militants have been killed by the police since the attack.