Authorities in Indian-occupied Kashmir tightened restrictions on people's movements on Saturday to prevent possible protests following a speech by Prime Minister Imran Khan.

In an address to the United Nations General Assembly on Friday, the premier warned of a bloodbath once India lifts its restrictions in Kashmir, which have been in force since it revoked the region's decades-old autonomy in August and detained thousands of people.

Soon after the speech, hundreds of Kashmiris came out of their homes, shouting slogans in support of Imran late on Friday night and calling for the independence of Kashmir.

On Saturday, police vans fitted with speakers made public announcements in some parts of Srinagar about movement restrictions, while additional troops were deployed to prevent protests, according to officials and two witnesses.

The troops also blocked access to the main business centre of Srinagar with razor wire.

“This was necessitated after protests across Srinagar city last night soon after Imran Khan's speech,” said a police official, who declined to be identified.

Two Indian officials said six Kashmiris and one Indian soldier had been killed in two separate incidents in the region.

Three fighters were killed in Ganderbal, about 19 kilometres north of Srinagar, according to one of the officials, who declined to be named. Another three were killed in Batote, located on the highway connecting Jammu and Srinagar, Indian defence spokesman Lt Col Devender Anand said.

'Inhuman curfew'

India's crackdown as it revoked Kashmir's special status was accompanied by severe restrictions on movement, as well as disconnection of telephone services. Though New Delhi has eased some of the movement curbs, no prominent detainees have been freed and mobile and internet connections remain suspended.

While warning of the consequences of lifting what he described as an “inhuman curfew”, Prime Minister Imran demanded India do so and free all detainees.

In some areas in Kashmir — including the Soura region near Srinagar which has witnessed protests in the past against India's decision — people clashed with security forces by pelting stones on Friday night, forcing police to use tear gas to disperse them, said the Indian official.

Imran addressed the UN a day after the senior US diplomat for South Asia called for a lowering of rhetoric between India and Pakistan, while saying that Washington hoped to see rapid action by India to lift restrictions it has imposed in Kashmir and the release of detainees there.