A Red Cross ambulance carried the coffin of Abbas Khan, anorthopedic surgeon from south London who had gone to Syria towork in rebel-held Aleppo, across the border into Lebanon.
Khan's family say they do not believe the explanation of hisdeath given by Syrian authorities - that he committed suicide byhanging, days before his scheduled release.
His mother Fatima Khan went to visit him in prison inDamascus on Monday but was told he had died. She accused theintelligence services of President Bashar al-Assad of killingher son.
"They murdered my baby, they killed my baby, this ismurder," she told reporters in Beirut.
Khan, 32, was detained in Aleppo 13 months ago, shortlyafter he entered Syria from Turkey. The body of the father oftwo is expected to be flown to the United Kingdom on Sunday.