Tall, quiet and well-liked, 28-year-old Dr Abdul Mateen Bashid never drank and indulged in a cigarette only occasionally. A small-town boy and the son of a professor, he was a successful academic who landed himself a job in the forensics department of J.J. Hospital, one of the best in Mumbai. But his qualifications and his status were no protection when police swooped. Dr Bashid is now in police custody on suspicion of involvement in a bus bombing in a Mumbai suburb in December that killed four people and injured 30. Since December, six explosions have rocked Mumbai, including the latest two, on August 25, in which more than 52 people died. Ten of those arrested were profiled this week by the Indian Express and all 10 were university graduates. In investigating the acts of terrorism, authorities have been surprised to find MDs, MAs and MBAs - doctors, chemical engineers, accountants, computer scientists, instrumentation engineers and multinational executives - among those arrested. Police said many were highly socially committed individuals with no criminal records who cared little for their own lives. Extremist Islamic groups in the city once recruited members of the Muslim-dominated underworld for subversive activities. But in recent years the authorities have crushed crime and police say the suspects they now bring in for interrogation are mostly university graduates. Some officers fear that last year's Gujarat riots - in which 2,000 Muslims were murdered by Hindu mobs - have radicalised Muslims from comfortable homes so that, instead of pursuing careers and raising children, they have become members of terrorist groups. These organisations range from the Students Islamic Movement of India (SIMI) - a Taleban-style group suspected of being behind some of the attacks - and the Lashkar-e-Taiba, a Pakistan-based group that operates in Kashmir but also has cells in Mumbai and other Indian cities. Banned after the September 11 attacks on the US, SIMI is alleged to have links with al-Qaeda, authorities say, and its goal is to 'liberate' India by establishing Dar-ul-Islam (Land of Islam) in a country where the vast majority are Hindus. The five people arrested in connection with the August 25 blasts were members of the Gujarat Revenge Group. One of them, Syed Mohammed Hanif, was an electrician at the Hilton Hotel in Dubai. Another, Arshad Ansari, was an auto-rickshaw driver who apparently told police he turned to terror after seeing women killed and raped during the Gujarat riots. Apart from the common motive of revenge, the men's profile is different from those of the numerous other suspects in police custody. They include Atif Nasir Mulla, 26, who has an MBA and worked as a product manager with a multinational company; Anwar Ali, 31, who has a master's degree in computer management and is suspected of planting a bomb on a suburban train in March; and Zaheer Ahmed Bashir Ahmed, 28, a chemical engineer who ran his own consultancy. The Gujarat riots were a watershed that gave rise to a profound sense of alienation and injustice among Indian Muslims. After seeing Muslim judges forced to flee their homes in fear of bloodthirsty Hindu mobs, even affluent Muslims throughout India began to feel insecure. 'I will never buy a house in an area where there are no Muslims. I just won't feel safe,' said New Delhi academic Sabiha Husain after the riots. Outside Mumbai too, police have broken up Islamic terrorist cells only to discover a high number of professionals. 'When people who have so much to live for turn to terror, you become anxious. It's a disturbing trend when people from good backgrounds join terrorist groups,' said Mumbai Home Secretary V. K. Mukopadhya. The concern of Mumbai police is that if wider, more respectable sections of the Muslim community feel such outrage about Gujarat, groups like SIMI or the Gujarat Revenge Force could find it easier to operate. Authorities fear that if there is a latent sympathy for their cause, it will be harder for ordinary Muslims to hand them over to police. 'Not many people will say this openly, but there is a fear that in Mumbai, which has a population density of 20,000 people per square kilometre, and where Muslims form 15 per cent of the population, breaking these groups could prove really difficult,' a Mumbai officer said. The bomb blasts have generated fears of even greater animosity between Hindus and Muslims. Radicalisation on both sides is widespread. Many Muslims worry that the whole community will be blamed for the acts of a few individuals. 'We want justice over Gujarat but only within the country's laws,' said Kamal Faruqi, a prominent Muslim leader. 'Those responsible for these bomb attacks are not helping India's Muslims and cannot be a friend of my country.'