I think, they should not be arrested. we all know our judicial system, it takes a lot of time to deliver the required results. If we will look after our procecution result of terrorist we will find 0 result, we know what happend to Azhar Masood and what is happening with Abu salem. So we should not waste our money, time and efforts in arresting and then waiting for results. One of the respondent talk about taking information out of them, my dear we have lots of information about them and we need to act on those information and not to collect information then show it to rest of the world as proof and then try to get their sympathy.