SRINAGAR, India (AP) - Indian Prime Minister Narendra Modi inaugurated an 11-kilometer (7-mile) tunnel through the Himalayan terrain on Sunday to help ease travel on a highway linking the troubled Kashmir Valley with the rest of India.

Modi drove in an open jeep through the all-weather route, which is expected to help trade and tourism in the region. The highway is blocked sometimes for hours and even days due to heavy snow, monsoon rains and landslides.

It took engineers six years to build the tunnel, which cost 25 billion rupees ($382 million).

However, separatist leaders fighting for the region’s independence from India or its merger with neighboring Pakistan shut businesses and public transport in the region on Sunday and said the construction of tunnels and roads would not succeed in appeasing them.

Kashmir is a “political issue and not a problem related to governance, economic packages, incentives or law and order,” they said in a joint statement issued on Friday.

They said Modi was visiting the state at a time when the situation was “extremely gloomy.”

Modi addressed a rally of thousands of people in the town of Udhampur after inaugurating the new tunnel and urged the youth of Kashmir to choose between “terrorism and tourism.”

He said decades of insurgency had caused bloodshed and hit tourism, a mainstay of the region. The Indian portion of Kashmir is popular with tourists for its lakes, mountains, ski slopes, gardens and religious sites.

Modi promised to boost the region’s tourism infrastructure, saying that the new tunnel would ensure that tourists were not stranded because of bad weather.

Jitendra Singh, a minister in Modi’s government from the region, said the connectivity through the tunnel would cut down travel time.

“It is an alternative to the highway, which gets closed during snow and rain. It will boost trade and increase revenue in the state,” Singh said.

Also Sunday, one policeman was killed and 10 security officers were wounded in a grenade attack by insurgents in Nowhetta, an old quarter of Srinagar, the summer capital of the Indian portion of Kashmir, as they were returning to their barracks after patrolling in the area, police said. The attack was unrelated to Modi’s visit to the region.

The rebels struck as the police and paramilitary forces were trying to quell some young anti-India protesters who attacked them with rocks, said Bhavesh Chaudhary, a spokesman for the Central Reserve Police Force. There were reports of several clashes between security forces and protesters at other places in the region.

Most people in the Indian-controlled portion of Kashmir favor its independence or a merger with Pakistan, which also administers a part of the territory across a heavily militarized de facto border through the mountains. Since 1989, at least 70,000 people have been killed in an armed uprising and ensuing Indian military crackdown.

The rebel groups have largely been suppressed by Indian troops in recent years, and resistance is now principally expressed through street protests.

India and Pakistan have fought two wars over control of Kashmir since they won independence from British colonialists in 1947.

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