At least 12 people were injured when a blast ripped through a cinema in Pakistan\'s southern port city of Karachi on Sunday night, according to police.Senior Superintendent Police Naem Sheikh told local media that the blast took place at about 10:30 p.m. local time inside the Kumhar Cinema at the Lee market of the city. The bomb was fixed under a seat inside the cinema, he said, adding that the explosion also caused a stampede among the panicked audience. More casualties could have occurred if not due to the fact that the bomb went off during the interval of the film, he said. Police have cordoned off the blast site area and all the injured people have been rushed to a nearby civil hospital. Local media quoted hospital sources as saying that most of the injured people received injuries in their feet and legs and they are not in critical condition. No group has claimed responsibility for the blast yet. This is the second blast in Karachi over the last couple of days. On Friday morning, an al-Qaida-linked suspect killed himself by blowing up a handgrenade inside his house when he was surrounded by the police during a routine search operation in Karachi. Police said that the suspect was a foreigner of Arab origin and he had received a three-month training from al-Qaida in Pakistan\'s northwestern tribal area of South Waziristan which borders Afghanistan before he came to Karachi.