(Xinhua) -- Some 200 students of a religious school in the Pakistani capital of Islamabad were reportedly arrested Sunday night, according to witnesses. The witnesses quoted the imam at the Lal Masjid mosque as saying that they were ready to sacrifice lives but would not surrender. Earlier Sunday, local press reports quoted Islamabad administration sources as saying that operation was likely against the Lal Masjid administration. They said roads to the mosque had been sealed and bearded people traveling in vehicles were taken out for body search. The Lal Masjid administration Saturday night freed two of the four policemen who were abducted Friday in return for four men detained by the police, the reports said, adding that the government agreed to release the four men Monday.