Police have arrested former Jaish-e-Muhammad leader Maulana Abdullah Shah Mazhar at a seminary in the Monghopir area of Karachi, Geo News reported on Thursday.Mazhar served as secretary general of the defunct Jaish-e-Muhammad led by Maulana Masood Azhar, but quit in 2002 because of differences with Azhar. He was arrested as he came to attend a conference held on the ‘Martyrs of Islam’ at the seminary, the channel said, adding that he was accused of holding the conference without the city administration’s permission.