Pakistani officials said Sunday that the government had arrested the nephew of Khalid Shaikh Mohammed, Al Qaeda’s former head of operations. Separately, the government detained nine people said to be part of a newly uncovered Qaeda-linked group responsible for a series of terror attacks.The interior and information ministers announced that Mr. Mohammed’s nephew, Mosabir Aroochi, was arrested this weekend in the port city of Karachi. Sheik Rashid Ahmed, the information minister, said a $1 million reward had been posted for Mr. Aroochi’s arrest. Mr. Aroochi does not appear on the F.B.I.’s list of its 22 most wanted terrorism suspects. Mr. Mohammed, who is suspected of having played an important operational role in the Sept. 11, 2001, attacks, was arrested in Pakistan in March 2003.Full Story