Indian security forces have arrested at least 500 people in Kashmir since the Hindu nationalist government instituted a blackout and lockdown in the disputed region.

The crackdown comes as the Indian government decided this week to revoke the Kashmir region’s autonomy and downgraded it from statehood to a territory.

Pakistan, which also claims the Kashmir region in full, on Thursday suspended a key train service with India over the change in Kashmir’s special status by New Delhi, as tensions between the two rivals soared.

PAKISTAN DOWNGRADES DIPLOMATIC TIES WITH INDIA AS KASHMIR ROW RAGES

The Pakistani government on Wednesday downgraded diplomatic ties and halted trade with India in response to India’s actions.

“PM directed that all diplomatic channels be activated to expose brutal Indian racist regime, design and human rights violations,” the government’s statement said.

At least for the time being, Islamabad isn’t considering any military actions and instead is looking at political and legal options to challenge India’s changes to disputed Kashmir’s status, said Pakistan’s foreign minister Shah Mahmood Qureshi.

Indian Prime Minister Narendra Modi, meanwhile, is expected to address the nation on Thursday to discuss Kashmir.

State-run All India Radio, which first reported on the mass arrests, said cross-border firing by Indian and Pakistani troops hit the Rajouri sector of the Indian-controlled Kashmir late Wednesday.

Some activists raised concerns about the lockdown of the region as some residents are unable to even call an ambulance as their access to phones is cut off.

PAKISTAN'S PM WARNS OF SUICIDE ATTACKS, WAR AFTER INDIA ENDS DISPUTED KASHMIR'S SPECIAL STATUS

India criticized Pakistan’s reaction to the situation in Kashmir, saying in a statement that “the intention behind these measures is obviously to present an alarming picture to the world of our bilateral ties,” but noted that it’s not surprising as Pakistan “has used such sentiments to justify its cross-border terrorism.”

Pakistan's Prime Minister Imran Khan warned Tuesday that India’s moves in Kashmir could lead to new suicide bombings and urged the world to take notice of India’s reckless behavior.

“With an approach of this nature, incidents like Pulwama are bound to happen again. I can already predict this will happen,” Khan said, referring to the February terror attack that killed 40 paramilitary police in Pulwama.

He expressed fears that Kashmiri people, angered over India’s decision to strip the region of its special status, may target Indian security forces, an attack New Delhi may pin on Pakistan.

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India and Pakistan have fought three wars in total for the control of Kashmir, India’s only Muslim-majority state where most people oppose Indian rule.

The Pakistani government said it will ask the United Nations to pressure India to reverse the move to downgrade Kashmir from a state to two separate territories.

The Associated Press contributed to this report.