Police may be having some leads to do so.. they have their own intelligence.There are lakhs of muslims in hyderabad. Then why they should pin point only these twenty people. the other arrested people might have spilled some beans which lead to arrest of poor chap.There may be certain information.If the police had done something wrong they will publicly apologise even all the political parties will apologise for minorities. Atleast the present govt has certainly no hatradeness towrads muslims... they might hate hindus. Its not that they love you but only because muslims vote blindly to elect them to power.May god bless India. some of the minorties betray govt by blasts and inturn Govt mislead them by false promises.