Internet services will be partly restored in Indian-controlled Kashmir from Saturday, ending a five-and-a half-month government-imposed blackout in the troubled region, though social media will stay offline, local authorities said.

Indian Prime Minister Narendra Modi's government imposed a communications blackout in early August when it revoked the special status of the part of Kashmir it controls – the most far-reaching move in nearly seven decades on the Himalayan region which is divided between India and Pakistan but claimed by both in full.

India also imposed a curfew, sent in tens of thousands of extra troops and detained dozens of Kashmiri political leaders and others, many of whom remain in detention, drawing criticism from abroad.

Internet access will be restored later Saturday but only to 301 government-approved websites that include international news publications and platforms such as Netflix and Amazon.

"Access shall be limited only to the whitelisted sites and not to any social media applications," the Jammu and Kashmir Home Department said in a notification.

Mobile phone data access will also be restored, but limited to slower second-generation (2G) connections, the department added.

India is the world leader in cutting Internet services, activists say, and access was also temporarily suspended in other parts of the country during recent protests against a new citizenship law.

Since August freedom of movement in heavily-militarized Kashmir has been gradually restored as has cellphone coverage, but apart from at a handful of locations there has been no regular Internet access.

This made life even harder for the region's seven million inhabitants and hit the local economy hard.

Modi's government said that the blackout was for security reasons, but the Supreme Court criticized the government move earlier this month, calling it an "arbitrary exercise of power".

The court also stated that having access to the Internet "is integral to an individual's right to freedom of speech and expression".

(With input from AFP)