SRINAGAR (Agencies) - Thousands of police in Indian-occupied Kashmir prevented a Hindu nationalist party from raising flags Wednesday to mark Indias Republic Day. Leaders of the Hindu nationalist Bharatiya Janata Party had planned to hoist the Indian flag in Lal Chowk, a Srinagar square that is a frequent site of anti-India protests. In reaction, the Jammu Kashmir Liberation Front, a pro-freedom group, said it would raise its party flag in the square. However, a swarm of armed police sealed off the square, allowing no one in. One BJP activist was arrested a few hundred yards (meters) from Lal Chowk after he began waving a small Indian flag, police said. SM Sahai, an inspector-general of police, said six other BJP activists were arrested elsewhere in the city as they came out of their hotel. Three Kashmiri leaders, Yasin Malik, Bilal Lone and Shahid-ul Islam, were arrested later as they tried to march to the square, he said. They were charged with violating a law banning assembly of people in the area. Officials in Held Kashmir as well as in New Delhi had warned that the BJP rally could trigger fresh protests in the region, where at least 100 protesters were killed in massive anti-India demonstrations last year. Three top leaders of the BJP were detained by authorities Monday hundreds of miles from Srinagar as they tried to make their way to the city. On Tuesday, about 500 BJP workers were arrested as they entered the region, police said. Three BJP leaders were released on Wednesday. In a Republic Day address, IHK Chief Minister Omar Abdullah called on pro-freedom groups to come to the negotiating table. I hope that you will become part of the dialogue and help contribute to a better future, Abdullah said. India enforced a strict curfew in Srinagar. The streets were completely deserted apart from the large numbers of security personnel who manned barbed-wire barricades across roads leading to Lal Chowk. No procession or gathering would be allowed in any part of the city, today, Srinagars district magistrate Meraj Kakroo said. Authorities also jammed local mobile phone networks. Anti-India sentiment runs deep in Held Kashmir, where Kashmiri groups are fighting for independence or merger with Pakistan. Kashmiris living on both sides of Line of Control and across the world observed the Indian Republic Day as 'black day to protest Indian occupation and apprise the international community of their responsibility regarding implementation of the United Nations resolutions on Kashmir which guarantee the right of self-determination. The call for observing black day was given by All Parties Hurriyet Conference. Protest rallies were staged in various cities, which were participated by leadership of all parties. Kashmiri leaders in their speeches called on international community to take notice of continued brutalities on innocent Kashmiris and massive violations of human rights by the Indian forces in Indian-occupied territory. Kashmiris all over the world are observing black day to draw the attention of peace loving people of the world and United Nations. We hope that the international institutions will acknowledge our efforts and force India to come forward and face the established truth, APHC convener Mehmood Ahmed Saghar said. The APHC staged a peaceful demonstration in front of the United Nations Military Observers Groups at Islamabad and handed a memorandum for the UN Secretary General to implement its resolutions on the Kashmir issue and take notice of continuous human rights violations by Indian security forces in occupied Kashmir. The memorandum calls on UN Secretary General Ban Ki-moon to appoint a special representative on Jammu and Kashmir to assess human right violations and stress upon the Indian government to put an end to state terrorism, desist from practices of repression, including disappearance, torture and custodial killings of Kashmiris. Meanwhile, India celebrated its Republic Day under heavy security. Security was especially tight in New Delhi where large sections of the capital were sealed off for the annual parade of military hardware. Around 35,000 police personnel, including 15,000 members of the paramilitary forces, were deployed across New Delhi for the event, which is always considered a possible target of militant attack. Indonesian President Susilo Bambang Yudhoyono was the guest of honour. Snipers manned rooftops along the route of the parade, while helicopters and unmanned surveillance drones monitored the area from above. In her annual address, Indian President Pratibha Patil flagged corruption and inflation as two of the main challenges facing the worlds second-fastest growing major economy.