EDITORS PLEASE NOTE: THIS EDIT CONTAINS CONVERTED 4:3 MATERIAL<br/> <br />At least 24 people were killed in an ongoing wave of violence over two days in Pakistan's biggest city Karachi, local media reported on Wednesday (August 29).<br/> <br />An empty bus was torched by angry protesters on Tuesday (August 28) night after a political worker was killed in the central part of the city.<br/> <br />Many of the victims, killed by gunmen on Monday (August 27) and Tuesday, were connected to political and religious groups, according to local media.<br/> <br />Fourteen people, including seven political workers, were killed in separate incidents on Tuesday alone.<br/> <br />A city of more than 18 million, Karachi has a long history of violence, with ethnic, religious and sectarian disputes often exploding into battles that involve entire neighbourhoods.