Photo: AP

An 11-hour standoff with alleged Islamic militants at an upscale bakery in Dhaka broke Saturday morning when Bangladeshi troops stormed the premises. Of the roughly three dozen hostages held at the café, offices found 20 had been killed in one of the deadliest terror attacks the country has seen, CNN reports.

Six of the attackers were also killed.

According to General Nayeem Ashfaq Chowdhury, 13 of the hostages were rescued.

The Islamic State claimed responsibility for the attack on Friday, according to the New York Times.

The attack took place in Dhaka’s diplomatic district and a news outlet linked to the Islamic State, Amaq, reported that the bakery where the attack took place is, “frequented by foreigners.”

Italian Prime Minister Matteo Renzi confirmed to the BBC that Italians were among the dead, and Italian news agency Ansa reported. as many as 10 Italians remain unaccounted for.

Japan’s Deputy Chief Cabinet Secretary Koichi Hagiuda told the BBC that seven Japanese nationals were inside the cafe at the time of the attack, though it’s unclear whether any of them are among the casualties.

Bangladesh’s Prime Minister Sheikh Hasina condemned the attack, CNN reports:

We don’t want these terrorists in Bangladesh. This type of situation is a first in Bangladesh, until now they were committing individual murders. But now suddenly they created this type of situation. What they did here was a very heinous act.

The attack took place during Ramadan on a day when those who observe the holy month would have been breaking their fast.

The Bangladeshi newspaper Daily Star reported that the gunmen tortured hostages who were unable to recite the Koran.