Julfikar Ali Manik, Geeta Adand, and Ellen Barry write in theNew York Times:

DHAKA, Bangladesh — The cook was crouching in a washroom, taking refuge from the gunmen who had invaded the Holey Artisan Bakery, when he understood that there was a logic behind the killing: The people in the restaurant were being sorted.

“Bengali people, come out,” one gunman shouted. When the cook, Sumir Barai, and eight other men opened the bathroom door, trembling, they saw two young men, clean shaven and dressed in jeans and T-shirts.

“You don’t need to be so tense,” one of the men told them. “We will not kill Bengalis. We will only kill foreigners.” At that, Mr. Barai’s gaze flicked to the floor of the restaurant, where he could see six or seven bodies, apparently shot and then sliced with machetes. All appeared to be foreigners.

The gunmen, he said, seemed eager to see their actions amplified on social media: After killing the patrons, they asked the staff to turn on the restaurant’s wireless network. Then they used customers’ telephones to post images of the bodies on the internet.

Friday night’s assault on the Holey Artisan Bakery in the diplomatic district of Dhaka, in which at least 20 hostages and two police officers were killed, marks a scaling up of ambition and capacity for Bangladesh’s Islamist militancy, which has until now carried out pinpoint assassinations, mostly of critics of Islam and members of religious minorities.

Among the dead from Friday’s attack, the police said, were nine Italians, seven Japanese, two Bangladeshis, one American and one Indian.

The attack also suggests that Bangladesh’s militant networks are internationalizing, a key concern as the United States seeks to contain the growth of the Islamic State.

Bangladesh’s 160 million people are almost all Sunni Muslims, including a demographic bulge under the age of 25. This makes it valuable as a recruiting ground for the Islamic State, now under pressure in its core territory of Iraq and Syria. Western intelligence officials have been watching the organization pivot to missions elsewhere in the world, launching attacks on far-flung civilian targets that are difficult to deter with traditional military campaigns.

Read the rest here.