MUZAFFARABAD, Pakistan/ISLAMABADMUZAFFARABAD, Pakistan/ISLAMABAD (Reuters) - As Pakistan's Prime Minister Imran Khan prepares to deliver another appeal to the world to address the situation in Kashmir, he faces the risk that rising anger in his country's portion of the disputed region could spiral into a confrontation with India.

Some people in Pakistan's portion of Kashmir said thousands of people were preparing to storm the line of control (LOC) - a ceasefire line agreed with India that is one of the most militarized frontiers in the world. Reuters could not independently verify the claims.

But regional tensions have swelled since India stripped its portion of Kashmir of autonomy in August, made mass arrests, limited communications and imposed curfew-like restrictions in some areas to contain a decades-long uprising against New Delhi's rule.

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Khan has appealed to Kashmiris to give him the chance to sway the international community and he is scheduled to address the United Nations General Assembly in New York on Friday, but patience appears to be in short supply in Pakistani Kashmir.

"We are all waiting for the United Nations...to see if the world can help us. Otherwise, we will try to break the LOC border," said Habib Urhman Afaqi, the president of the Jamaat-e-Islami political party for the district of Kotli, near the LOC. He said tens of thousands of men around the region were organizing by word of mouth and social media.

"We are preparing people, emotionally, and collectively we will be ready to fight on 27 September," Afaqi said.

As of Thursday, there were no signs of any gathering of people in Muzaffarabad, the capital of Pakistan's portion of Kashmir which is about 30 km (18 miles) from the LOC. Political leaders in the region said they were waiting until after Khan's speech to take action.

Khan has strongly criticized New Delhi's actions in Kashmir in an international diplomacy campaign and cut off trade ties, but has condemned the plan to storm the LOC. He said in a speech this month that anyone who attempted to cross the border risked drawing the ire of India, losing international sympathy and would be an "enemy of Kashmir".

Pakistan's military said it would not allow any one to cross the LOC.

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"Pakistan is making all peaceful/diplomatic efforts to awaken world conscience to get them (Kashmiris) relief," the military's media wing said in an e-mail. "However, as stated earlier Pakistan keeps all options open and shall go to any extent as regards resolution of the Kashmir dispute."

"CANNON FODDER"

Both India and Pakistan are nuclear powers and have fought three wars since independence in 1947, two of them over Kashmir.

A spokesman for the Indian military warned against using Kashmiris as "cannon fodder" and said he hoped Pakistan would ensure the LOC was not breached.

"The Indian army is aware of the public utterances of Pakistani leaders aimed at instigating unarmed civilians," the spokesman said in response to a question from Reuters.

"It is a known fact that they are being sent on harm's way to create a humanitarian crisis to draw world attention."

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Khan told the New York Times on Wednesday that he would appeal in his speech for United Nations intervention in Kashmir but was not optimistic he could accomplish much in the short-term. He warned of large-scale violence in Indian Kashmir when the restrictions on civilian movements were lifted.

Kashmir has been Pakistan's single most pressing foreign policy issue since it was born out of British colonial India, but some Pakistani Kashmiris say Khan is being weak.

"Imran Khan has nothing at stake and this decision whether to trample down or storm the LOC should be of the Kashmiris,” said Subiyal Rasheed, a 35-year old software engineer from the town of Rawalakot, who says he is speaking with other young men about storming the LOC en masse.

Memes using the hashtag"#TweetoSultan" went viral in recent weeks, a play on historic Muslim warrior Tipu Sultan and a dig at Khan that his battle was being waged through ineffective emotional tweets.

Khan told reporters in New York this week that he was doing everything he could.

"We can't attack India, clearly that is not an option, and apart from that we're doing everything possible we could do," Khan said.

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India, which says its revocation of Kashmir's special status will allow the region to develop economically, has long accused Pakistan of training, arming and sending militants to Kashmir.

Pakistan denies this and says it only provides diplomatic and moral support to non-violent separatists in the region.

Khan has stepped up his warnings this month that India is planning a 'false flag' attack on its own soil to give it an excuse to attack Pakistan, a claim India denies.

Syed Salahuddin, a Kashmiri militant commander who heads an alliance of over a dozen groups fighting Indian rule in Kashmir, said in a speech this month that "harsh steps" from Pakistan's government had hindered his groups' ability to take action.

He later said in an interview that Pakistan should send troops across the border or convince the United Nations to send peacekeeping troops there.

"Pakistan has been extending us political and moral support...but the Kashmiris want some practical steps," he told Reuters by phone, declining to answer further questions.

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(This story corrects spelling of "cannon" in paragraph 12, sub-head.)