Prime Minister Imran Khan’s government on Wednesday announced a series of measures to oppose what it called “unilateral and illegal actions” by India. He also said Pakistan will review bilateral agreements, take the matter to the United Nations Security Council and ensure the army remains vigilant.

New Delhi responded by saying its decision on Jammu and Kashmir was “entirely the internal affairs” of India. It urged Pakistan to review its actions so “that normal channels for diplomatic communications are preserved,” foreign ministry said in a statement Thursday.

1-Downgrading of diplomatic relations with India.
2-Suspension of bilateral trade with India.
3-Review of bilateral arrangements.
4-Matter to be taken to UN, including the Security Council.
5-14th of August to be observed in solidarity with brave
Kashmiris. #StandwithKashmir pic.twitter.com/v06GmMc5lG

— Govt of Pakistan (@pid_gov) August 7, 2019
Relations between the nations have already been strained since February, when a suicide bombing in Kashmir killed 40 Indian paramilitary troops. There was an exchange of airstrikes following that attack.

Still, the suspension of trade may not have much impact. India in February withdrew the ’most favored nation’ status accorded to Pakistan and bilateral trade between the two countries amounted to about $2.5 billion in 2018, roughly 3% of Pakistan’s total trade and about 0.3% that of India.

Prime Minister Narendra Modi’s decision on Kashmir fulfilled a campaign promise made to his Hindu base, which opposed special treatment for the region. The state has been the main flashpoint between the two nuclear powers, which have fought three wars since the British left the subcontinent in 1947.

“Pakistan’s move is wholly expected,” said Michael Kugelman, deputy director of the Asia Program at the Washington-based Wilson Center. “Despite its bluster, Islamabad has limited true retaliatory options,” he said. “There’s no way it can get India’s decision to be reversed, and it’s not about to send troops into Kashmir, and so naturally it will take the few risk-free punitive steps at its disposal.”

Kashmir, in the Himalayas, has been divided between India and Pakistan since independence, and is claimed in full by both. Two of the nations’ three wars were fought over the territory. While artillery and small-arms exchanges across the disputed border have been common, the airstrikes marked an escalation not seen in decades.

India accuses Pakistan of supporting armed extremists in Kashmir, its only Muslim-dominated state. Pakistan denies the charges and says it offers only moral support to separatists.

As part of the diplomatic downgrade, Pakistan told India to withdraw its high commissioner from Islamabad, and informed the Indian government that it wouldn’t be sending its designated commissioner, according to a statement on the Pakistan Foreign Ministry website.

India tightened security at airports in its four biggest cities and restricted visitors’ entry. Aviation has emerged as a “soft target” for terrorists attacks following the developments in Kashmir, India’s Bureau of Civil Aviation Security said in an advisory, released by Mumbai airport.

India would have factored in a response when it made the move to revoke autonomy for Kashmir, and probably won’t be overly alarmed by Pakistan’s reaction, said Harsh Pant, professor of international relations at King’s College London.

“Pakistan is desperate to bring the international community into this discussion,” Pant said. “It is hoping that by raising the stakes it would be able to force others to respond.”

Yet, differences over the changes in Kashmir are likely to be fought through diplomacy and both states unlikely to breach the crucial bilateral non-nuclear aggression agreement, said Gopalaswami Parthasarathy, India’s former high commissioner to Pakistan.

“The Pakistani army is adventurous, not suicidal,” Parthasarathy said. “The bilateral nuclear agreement remained in place through tougher periods like Kargil when their army crossed over the border. In this case, they will at best go up to the United Nations Security Council.”