Bangladesh's home minister has denied that so-called Islamic State had any role in the deadly cafe attack.
Asaduzzaman Khan also dismissed the involvement of al Qaeda, saying that the gunmen were home-grown militants.
Mr Khan added that the gunmen in the attack at the Holey Artisan Bakery had made no demands when police had asked their intentions.
Three of the six gunmen killed were under the age of 22, he said, and added that they had been missing for six months.
Most of the 20 people killed by the attackers were foreigners, among them a US citizen.
At least 13 people have been rescued following the raid, according to a Bangladeshi official.
Twenty hostages have been killed in an attack on a cafe in the Bangladeshi capital. So-called Islamic State have claimed responsibility.