Iraqi forces have captured the leader of an al Qaida-affiliated terrorist cell allegedly responsible for carrying out a string of beheadings, the government said. The government identified the cell leader as Mohamed Najam Ibrahim and said he had been arrested by Iraqi National Guardsmen in Baqouba, 35 miles north east of Baghdad. It gave no date for the arrest. A government statement said Ibrahim's operation was linked to Jordanian-born terror mastermind Abu Musab al-Zarqawi, who leads a shadowy uprising linked to Osama bin Laden's al Qaida network.Ibrahim had carried out the beheadings with his brother, the government said. "The two beheaded a number of citizens in addition to launching attacks against Iraqi security forces," the statement said. The government said Ibrahim was being interrogated by authorities for more information they hoped would lead to other arrests. Last week, police said they had arrested two other leaders of the uprising in Baqouba, including a top aide to al-Zarqawi, Haidar Abu Bawari.