New Delhi: As the government cracks down on websites purportedly carrying anti-India propaganda of terror groups such as Islamic State, security agencies have found that many of these portals do not have contact details of their owners and have servers based outside the country.

The concerned agencies are finding it difficult to proceed with legal action against these websites in the absence of any co-operation from domain registrars and other entities in the United States and Europe where their servers are based, official sources said.

These websites have been accused of allowing anti-national content and propaganda of various terror groups, including that of banned IS, to be hosted on their platforms.

The government recently blocked 32 websites following a Mumbai court order, citing serious national security concerns. Out of these, only seven websites responded to the notices and assured that they would not allow any terror-linked materials.

Unfazed by criticism on micro-blogging sites like Twitter on its move to block these 32 websites, the government has made it clear that there would be no compromise on national security.

Some of these websites were used to propagate material about Areeb Majid, an alleged IS member who was arrested by NIA, and also about death of one Anwar Hussain, a resident of Karnataka, and induce other Indians to join in activities of IS.