NEW DELHI (APP) - Over 7,000 Muslims were arrested in Tamil Nadu state in India for protesting against demolition of Babri Mosque in 1992. They were demonstrating on the 16th anniversary of demolition of the Mosque. Media reports from Chennai said the authorities had tightened security ahead of the demonstrations in the communally sensitive Coimbatore district of the state by deploying additional force at airports and places of worship. The authorities arrested activists of Tamil Nadu Muslim Munnetra Kazhagam (TMMK) and Tamil Nadu Towheed Jamaat (TNTJ) when they tried to stage "rail rook" and demonstration in many places, including Chennai, Coimbatore and Tirupur, demanding rebuilding of Babri Masjid. In Chennai alone, around 1,500 members of TNTJ were arrested near Raj Bhavan while about 800 members of TMMK were held at the Central and Egmore Railway Stations, the police said. In Coimbatore over 2,000 activists of TMMK and TNTJ were detained. Similar protests were also staged in other cities and towns of Tamil Nadu. Meanwhile, Muslim organisations in India have demanded President Pratibha Patil to re-build the mosque at its original site. Mohammed Younus Siddique, President of Babri Masjid Re-Building demanded arrest of opposition leader L K Advani, BJP's senior leader Murli Manohar Joshi, Bharitya Jan Shakti leader Uma Bharti and others in connection with demolition of Babri Masjid. Meanwhile, Hindu Mahasabha activists tried to stage March towards Babri Mosque site in Ayodhya on Saturday. Fifty of them were arrested, police said. "Youm-e-gham" and 'Black Day' was observed by Muslim organisations in Ayodhya to protest the demolition of the mosque. Black flags were hoisted on houses and a memorandum addressed to the Congress Government demanding reconstruction of the mosque was handed over to the district magistrate in the city. Meanwhile, explosives were found at a private nursing home in the western Indian city of Nagpur, prompting the evacuation of dozens of people, local media reported Saturday. A sniffer dog located what the police bomb detection and disposal squad called "a live bomb" wrapped in a plastic bag at the facility, the Press Trust of India news agency said. Indian television station NDTV said 50 people had been evacuated from the building. Police in Maharashtra state were not immediately available for comment when contacted by AFP. The discovery came as India was on high alert following deadly attacks in the Maharashtra state capital Mumbai on Nov 26-29. Nagpur is about 900 kilometres northeast of Mumbai.