US Vice President Joe Biden has urged Pakistan to fight growing religious extremism. Addressing a joint press conference with Pakistan Prime Minister Yousaf Raza Gilani in Islamabad on Wednesday, Mr. Biden also tried to dispel what he called common anti-American misperceptions in Pakistan. Speaking to newsmen after talks with Pakistani leaders, he rejected the charge that the US has not imposed its anti-terror war on Pakistan. Mr. Biden said that since attacking the United States in September of 2001, al-Qaida-linked violent extremists still pose a threat not just to the United States but to Pakistan and to the entire civilized world.Vice President Biden tried to counter anti-U.S conspiracy theories commonly heard in Pakistan, saying they are dead wrong. He said that the United States does not favour neighbouring India at Pakistan's expense, it does not want to break-up the Muslim nation and Washington is not at war with Islam. Just hours after U.S Vice President Joe Biden spoke in Islamabad, a suicide car bomber struck a police station in a northwestern Pakistani town of Bannu, killing more than a dozen security personnel.