ROUGH CUT (NO REPORTER NARRATION).<br/> <br />STORY: Two bomb blasts and a suicide attack targeting security forces in Pakistan's biggest city Karachi killed four people including three paramilitary troops on Wednesday (January 29), authorities said.<br/> <br />Four others were wounded in the attacks.<br/> <br />In the first incident, one paramilitary soldier was killed and three were injured after two bombs exploded at the North Nazimabad area in the western part of the city.<br/> <br />Later, a suicide bomber blew himself up when intercepted by the security officials outside the Rangers' headquarters located in the same area, killing two soldiers and a civilian security guard, and injuring another.<br/> <br />The bodies and injured were transported to a nearby hospital.<br/> <br />No one has immediately claimed responsibility for the attack.<br/> <br />The steamy port city of Karachi is Pakistan's financial heart and home to 18 million people. It typically sees about a dozen murders a day, a deadly combination of poli
