Asif Ramzi, one of the country's most wanted criminals, linked to the murder of journalist Daniel Pearl died Thursday in an apparently accidental explosion at a secret bomb factory in Karachi, Pakistani police say. Another three men were killed in the explosion. Ramzi was the target of a massive manhunt with a reward of $50,000 offered for his capture. He was one of the leaders of the outlawed extremist group Lashkar e-Jhangvi wanted in connection with sectarian bombings and a string of parcel bombs mailed in Karachi in October.