Police have arrested their first suspect over the gang-rape of an elderly nun at an Indian convent . Mohammad Salim Shaikh , 30 , was detained in a hideout in Mumbai on Wednesday night and has been transferred to Kolkata , a police spokesman said . His arrest comes 12 days after the 74-year-old nun was locked in a room and raped while trying to prevent six men from assaulting another woman and robbing the Christian missionary school . Scroll down for video . Arrest : Police have arrested Mohammad Salim Shaikh over the gang-rape of an elderly nun at a Indian convent . Mumbai police commissioner Rakesh Maria said : 'The West Bengal team had the lead , they shared the information with us and sought our assistance . 'The assistance was provided and the accused was arrested from the Nagpada area and has been taken away by the Bengal team , ' he told The Indian Express . CCTV was released three days after the attack showing some of the suspects leaving the staff room at the Convent of Jesus and Mary School in West Bengal . A reward of 100,000 rupees ( £1,075 ) was on offer for any leads , police said . They detained five men for questioning but did not make any arrests . It is not known if Salim was caught on camera , Indian TV reported . Guarded : The 30-year-old was made to sit inside a police vehicle , which was waiting outside a court in Ranaghat . Careful : The guards clutched Salim 's arms and made sure he had handcuffs on as they led him past the press . Arnab Ghosh , a police superintendent , said the men , aged between 20 and 30 , scaled the boundary wall around 11.40pm on Friday 13 March . They entered the school and disconnected the telephone lines , he added . The robbers then tied up and gagged a security guard before entering the nuns ' room , where they found the women sleeping . When the victim , who is the oldest nun at the school , tried to stop them taking another woman into a separate room they raped her . Caught : Three men were pictured on the Convent of Jesus and Mary School 's CCTV but it is not known if Salim was one of them . Suspects : The CCTV footage was released three days after the attack showing the suspects leaving the school 's staff room around midnight . Five other men were detained for questioning . The men escaped with some cash , a mobile phone , a laptop and a camera . They also ransacked the school 's chapel and took holy items . CCTV showed books and papers strewn across the floor as the men left the staff room . Mr Ghosh added : 'At least two of them were armed and the rest were carrying burglary tools . In the chapel , a holy scripture was found torn and a bust of Jesus was broken . ' The nun was taken to hospital in Ranaghat around 7am on Saturday 14 . Demonstrations : Prayers were said at churches across India . Hundreds of people staged a demonstration in Ranaghat , where the nun is being treated in hospital , two days after the attack to demand justice . Sorrow : Nuns gathered in front of the convent after the attack . Archbishop Thomas D'Souza said the sisters prayed for the victim during Sunday Mass . Outrage : The robbers tied up and gagged a security guard before entering the nuns ' room . Furious residents and students took to the streets after the attack to demand justice . Atindranath Mondal , hospital superintendent , told The Times of India : 'Immediately a team of doctors attended to her and a senior gynaecologist operated on her . ' She is now thought to be recovering well . After the attack furious residents took to the streets , demanding action and blocking off the main highway . Hundreds of students from the school carried banners with the slogan 'we want justice ' . Prayers : Crowds of students from the Christian missionary school lit dozens of candles at a peaceful protest . Scene of the crime : Police stood guard outside the convent school at Ranaghat , north of Calcutta , while others searched for evidence . Mamata Banerjee , West Bengal Chief Minister , tweeted her condemnation of what she called a 'horrific attack ' promising 'swift , strong action ' . Archbishop Thomas D'Souza said : 'They not only committed a heinous crime , but they also vandalized the chapel . 'This is the first time such an attack has happened in India . '
Mohammad Salim Shaikh was detained in Mumbai yesterday evening . 74-year-old nun raped after stopping gang from assaulting another woman . The Times of India was released of six men but it is not known if Salim was one of them . Attack caused days of furious demonstrations and peaceful protests .