A sum of rupees 13.5 million was looted from a cattle trader at the cattle market here in Multan on Sunday morning. According to media reports, six unidentified armed persons this morning robbed at gunpoint Rs13.5 million from a trader Liaquat and his uncle Ismail, who on resistance was shot in his leg at the sprawling cattle market set up at Nagshah Chowk in the city here. The enraged traders staged a protest demonstration, when the PS Mumtazabad police on information reached the scene of incident.