Yemeni tribal chief Tareq al-Fadhli, in the spotlight for his alleged ties to Al-Qaeda, has been placed under house arrest in the port city of Aden, according to a local official and a tribal leader. The announcement came late on Saturday just hours after two of Fadhli’s aides were killed in clashes with pro-army militiamen who have been surrounding his home in the southern province of Abyan since last week.