SRINAGAR: Hundreds of protesters tried to storm a military airbase in Indian-occupied Kashmir on Monday, the third day of deadly clashes between government forces and demonstrators angered by the killing of a popular young leader.

At least 30 Kashmiris had now died in the violence, most of them protesters martyred by gunshot wounds as Indian forces fired live ammunition and tear gas to try to enforce a curfew imposed across the Kashmir Valley.

Thousands again defied the curfew to take to the streets on Monday. Police said several hundred protesters tried to storm an Indian Airforce base about 25 kilometres (15 miles) south of the capital Srinagar as the worst civilian unrest since 2010 spread.

"A few hundred protesters stormed the airforce base," said a senior officer on condition of anonymity.

"We do not know if firearms were used, but the protesters were pushed back," he said, adding there were no immediate reports of casualties.

Protesters also set police stations and vehicles on fire. On Sunday one police officer drowned when his armoured vehicle was pushed into a river.

The demonstrations follow the martyrdom on Friday of Burhan Wani, a 22-year-old leader of Hizbul Mujahideen (HM), during a gun battle with Indian forces.

Around 300 people have been injured, including nearly 100 police officials, and hospitals say they are overwhelmed.

There were also reports of injured protesters being targeted; one local doctors’ association said Sunday that tear gas canisters had been fired inside a hospital emergency room.

Another group, the Jammu and Kashmir Coalition for Civil Society, alleged that police had attacked ambulances taking the wounded to hospital.

The Indian authorities have cut off the Internet and mobile phone networks to try to stop the protests spreading.

It is the worst civilian violence to hit the restive region since 2010 when mass protests broke out against Indian rule.

On Sunday, Pakistan expressed deep shock at Wani’s death.

A statement from the prime minister’s office condemned the "excessive and unlawful force" used against those protesting the killing, adding: "Oppressive measures such as these cannot deter the valiant people of Jammu and Kashmir from their demand of exercising their right to self-determination."

Kashmir has been divided between rivals India and Pakistan since 1947, but both claim the territory in its entirety.

Tens of thousands of people, mostly civilians, have died in the fighting since 1989.

Violence has sharply declined in recent years following a major crackdown by the hundreds of thousands of forces deployed in the region.

But a recent uptick in attacks has galvanised frustrated young Kashmiris, many of whom deeply resent the military’s presence.

Wani joined the HM at the age of just 15 after his brother was allegedly tortured by Indian forces.

His strong presence on social media where he posted pictures of himself in army fatigues and videos of his band of fighters, made him a rallying point for Kashmir’s youth and tens of thousands of mourners attended his funeral.

On Monday, Kashmiri leaders said a shutdown protesting his death should be extended by two more days, and called a rally in the main city of Srinagar on Friday.