Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Gas Cylinder Shop Blast in Karachi Kills 2 by VOA News Authorities in Pakistan say at least two people were killed and 10 injured Sunday when a gas cylinder explosion tore through a residential building in Karachi. Police Surgeon Dr. Summaiya Syed told Dawn news that two of the injured are in critical condition. Police say the blast happened in a gas cylinder shop on the ground floor of the structure. Emergency workers fear people could be trapped under the rubble.