KARACHI: An interim challan was produced by police in an anti-terrorism court in Karachi on Wednesday, pertaining to the May 12 violence case which stated that MQM’s Waseem Akhtar had confessed to his involvement. The challan further stated that based on important information provided by Waseem Akhtar, central suspect Aslam alias Kala was arrested. Waseem Akhtar is the nominated mayor of MQM and is considered the favourite to win the mayoral election. However, he is currently under arrest in multiple cases but was allowed to cast his vote on Wednesday when he was transported from his cell to the KMC building in an armoured car earlier during the day. On May 12, 2007, various political parties in Karachi clashed with each other on the occasion of the then deposed Chief Justice of Pakistan, Iftikhar Muhammad Chaudhry’s visit to the city. As he arrived at Jinnah International Airport, clashes broke out between armed members of political parties as more than fifty people were killed and hundreds injured. Opposition parties at that time blamed MQM for the violence while the Karachi-based party has always refuted the allegations, and instead blamed the PPP, PML-(N) and the ANP for the carnage.