epa01744260 An Indonesian customer sits in front of computer and views the Facebook homepage at an internet cafe in Jakarta on 28 May 2009. Around 700 ulama or Islamic religious leaders have issued an edict to limit use of the popular Internet networking site Facebook in Indonesia. However, it seems that many people from the country, which has the world's largest Muslim population, use Facebook often and it is growing in popularity. Facebook has now become an important work and social tool for some religious leaders. Irrespective of the religious edict, Facebook has become the most visited website in Indonesia. EPA/ADI WEDA

Indonesia shut down at least 11 radical websites and several social media accounts on Saturday after a deadly gun and bomb attack claimed by Islamic State rocked the capital earlier in the week.

Authorities said several accounts had been found on social networking website Facebook expressing support for Thursday’s attack in Jakarta’s commercial district, which killed seven people including five militants, and injured around 30 others.

The brazenness of the assault, which lasted several hours, suggested a new brand of militancy in a country where low-level strikes on police are common.

“We are monitoring many websites and public complaints about this,” said Ismail Cawidu, a public relations official at the communications ministry.

The government had also sent letters to social media companies such as Facebook, Twitter and Telegram requesting that radical material be immediately blocked or taken down, Cawidu said.

The alleged mastermind behind this week’s attack, an Indonesian citizen fighting with IS in Syria, is believed to have used social media extensively to share his beliefs about Islamic State and communicate with contacts in Indonesia using blog posts and mobile messaging apps.

Police said late on Friday that two of the attackers had been identified as raids continued across the country to track down any other militants in the networks they belonged to.

Authorities believe there are up to 1,000 IS sympathisers in Indonesia.

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