Indonesia’s biggest Muslim organization is calling on the government to block international radical Islamist sites.
Nahdatul Ulama says extreme teachings are fueling racial violence across Indonesia.
It is understood a suicide bomber who attacked a church in Central Java last week accessed radical Islamist websites.
The government has already passed laws which enable it block Indonesian websites deemed a threat to threat.
Communications Minister Tiffatul Sembiring says his department has so far blocked 300 sites believed to contain radical views.
But he said blocking every extremist website would be impossible.