Beirut , Lebanon ( CNN ) -- The alleged chief of an al Qaeda-affiliated jihadist group who was arrested by Lebanese authorities this week has died in custody , the Lebanese army said Saturday . The Lebanese army issued a statement `` confirming the death of detainee Majed Al-Majed this morning at the central military hospital after deterioration in his health . '' A Saudi national , Al-Majed is accused of heading the Abdullah Azzam Brigades , a Sunni jihadist group that has claimed responsibility for several bombings . News of his death , which comes only a day after the Lebanese army announced his arrest , has prompted questions in Lebanon over exactly what happened . No details of his health issues have yet been released . Al-Majed was captured a few days ago by Lebanese army intelligence agents , Lebanon 's state-run National news Agency said . The army said Friday that Al-Majed , whose identity was confirmed by DNA testing , had been on Saudi Arabia 's most wanted list since 2009 . The Abdullah Azzam Brigades recently took responsibility for a pair of suicide bombings targeting the Iranian Embassy in Beirut that left more than 20 people dead . The group warned that more attacks would come unless Hezbollah , a Lebanese-based , Iranian-backed Shiite militia , stopped sending fighters to support Syrian regime forces . The Abdullah Azzam Brigades has previously claimed responsibility for a failed attack on U.S. warships docked in Jordan and for bombings of Egyptian beach resorts in 2004 and 2005 that killed more than 100 people . The United States declared it a terrorist group in 2012 , saying it was responsible for a 2010 attack on a Japanese-owned oil tanker in the Strait of Hormuz and had expressed interest in attacking Western interests in the Middle East . The group formed in the Palestinian refugee camps in Lebanon and has battled Lebanese government troops before . U.S. to Americans in Lebanon : 'Exercise extreme caution ' CNN 's Nada Husseini contributed to this report .
Detainee Majed Al-Majed died after his health deteriorated , Lebanon 's army says . The Saudi national was detained by the Lebanese army in the past few days . He was the alleged head of an al Qaeda-affiliated jihadist group , the Abdullah Azzam Brigades . The group has claimed responsibility for attacks in Lebanon , Egypt and Jordan .