Multiple blasts kill 4 people in Pakistan

At least four people were killed and four others were wounded in multiple blasts targeting security personnel in Pakistan's southern city of Karachi on Wednesday.Three bomb blasts, including a suicide attack, killed at least four people, including three paramilitary rangers and a private security guard, according to police officials.Two improvised explosive devices were placed close to a rangers' checkpoint in the busy North Nazimabad neighbourhood, killing one soldier and wounding three, said senior police officer Amir Farooqi.In another incident, a suicide bomber blew himself up at the entrance of a rangers' headquarters, killing two soldiers and a civilian security guard and wounding another.The suicide bomber had tried to force his way into the premises before blowing himself at the gate as guards were trying to apprehend him.Karachi, a city of 18 million people and which contributes 42 per cent of Pakistan's GDP, has been a target of militant insurgency, sectarian violence, gang wars and abductions.