The head of the Syrian rebel Liwa al-Tawhid Brigade has died of wounds he suffered in a regime air strike last week, the rebels and a monitor said today.
"Abdel Qader Saleh has been martyred," said a posting on a Facebook page linked to the brigade.
The Britain-based Syrian Observatory for Human Rights also reported the death.
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"He was taken to Turkey after being wounded, and died in a hospital there before being brought back to Syria for burial," Observatory director Rami Abdel Rahman told AFP.
Thursday's strike also killed Yussef al-Abbas, known as Abu al-Tayyeb, Liwa al-Tawhid's intelligence chief.
He had been in a car along with Saleh, and another senior figure in the rebel group, Abdelaziz Salameh, who was also wounded.
Following the attack, Liwa al-Tawhid arrested 30 people suspected of being informers for the regime of President Bashar al-Assad.
Saleh, chief of operations for Liwa al-Tawhid, was widely seen as the brigade's most important figure.
His death comes as the Syrian regime makes new gains in Aleppo, seizing several towns and talking about reopening the Aleppo International Airport after nearly a year of closure.
Liwa al-Tawheed is believed to have some 8,000 fighters and is among a number of Islamist units that have rejected the mainstream opposition National Coalition.
It does participate in the military command linked to the Coalition, and is one of the best known rebel brigades fighting in the Aleppo area, with Saleh widely known in the region.