Pakistani security forces have arrested nearly one hundred terror suspects across the violence - wracked southern port city of Karachi, security sources say.Local security officials said on Tuesday that paramilitary troops have rounded up at least 97 suspects during cleanup operations in different districts of the volatile city over the past 24 hours, the dailyDawn newspaper reported. The law enforcement agencies also seized arms and ammunitions, including explosives, machine guns and grenades. The developments come weeks after Pakistani Prime Minister Nawaz Sharif urged senior leaders of all political parties to help restore peace to Karachi, which is home to numerous ethnic groups and has been hit by clashes between rival ethnic and political factions in the past two decades. Sectarian, political and ethnic violence in Karachi has killed hundreds of people in Pakistan's main commercial hub so far this year. The Human Rights Commission of Pakistan (HRCP) has said in a recent report that targeted attacks have claimed the lives of nearly 1,800 people across the troubled city in the first six months of this year. Moreover, the Taliban militants have also been trying to gain ground in Pakistan's commercial capital in recent years. The security forces have arrested several Taliban commanders across the city over the past few months. Pakistan's top court has ordered the government law enforcement agencies to take immediate action against pro-Taliban militants in the country's largest city. Despite the Pakistani government's operations against Taliban militants and associated groups, they have been able to spread their influence in various regions of the country and kill thousands of people. Thousands of Pakistanis have lost their lives in the bombings and other militant attacks since 2001 when Pakistan entered an alliance with the US on the so-called war on terror. Thousands more have been displaced by the wave of violence and militancy sweeping across the country.