Top Syrian rebel commander Abdul Qadir al-Saleh dies

A top Syrian rebel commander has died of wounds he sustained in an air strike on a rebel-held air base in Aleppo province on Thursday, his group says.

Abdul Qadir al-Saleh, the leader of Liwa al-Tawhid, died overnight, a spokesman told the Associated Press.

Liwa al-Tawhid is one of the main rebel forces in Aleppo and is estimated to have between 8,000 and 10,000 fighters.

Meanwhile, senior figures from the Syrian regime are in Moscow to discuss plans for a peace conference.

Deputy Foreign Minister Faisal Mekdad led the team, which has been meeting counterparts in the Russian foreign ministry.

The Syrian opposition National Coalition told AFP news agency its president had also been invited to visit Moscow at the same time, but had been unable to attend due to prior commitments.

The United States, Russia and the United Nations are trying to convene the much-postponed conference in Geneva to try to end the civil war.

Monday's meetings follow a telephone call on Thursday between President Vladimir Putin and Syrian President Bashar al-Assad, which the Kremlin said was their first since Mr Putin returned to the Russian presidency in 2012.

Liwa al-Tawhid formed in July 2012, uniting many separate fighting groups in the northern Aleppo countryside. Later that month, it led a rebel offensive on the city of Aleppo and took control of several districts.

In January, Liwa al-Tawhid joined the Syrian Islamic Liberation Front (SILF), an alliance of Islamist groups which mostly recognise the Supreme Military Council of the Free Syrian Army but not the National Coalition.

Saleh, a former businessman from the town of Marea, had been meeting other senior figures from Liwa al-Tawhid at the time of the air strike.

Youssef al-Abbas, also known as Abu al-Tayyeb, died soon after the attack. There are conflicting reports about whether he was the brigade's intelligence or financial chief.

Saleh was meanwhile rushed to a hospital in neighbouring Turkey. The opposition Aleppo News Network reported on Friday that he was in a "good condition".

However, Saleh's subsequently died and was brought back to Syria for burial, Liwa al-Tawhid and activists confirmed on Monday.

"We declare the martyrdom of Abdul Qadir al-Saleh," a statement by the brigade said.

Abdul Aziz Salama, the brigade's political leader, has assumed overall command, the group's spokesman said.

Liwa al-Tawhid arrested 30 people suspected of being government informers following the strike.

"As an individual, he was very, very important, certainly in the Aleppo area, but increasingly as an individual that many in Syria felt represented the revolution," Charles Lister, an analyst at IHS Jane's Terrorism and Insurgency Centre, told the AFP news agency.

"He came from a humble background, was outwardly religious but was very open... and he maintained extremely good relations with almost all groups of all different natures."

He said Saleh's death might "spur on the rebels to launch a counter-attack as the regime advances" on opposition-held parts of Aleppo.

A week ago, Liwa al-Tawhid joined five other rebel groups operating in the city, including the al-Qaeda-affiliated al-Nusra Front, in urging people to "face up to regime attacks".

Their joint statement said government forces backed by fighters from the Lebanese Shia Islamist movement Hezbollah, Iranian Revolutionary Guards and members of Abu al-Fadl Abbas, an Iraqi Shia militia, had launched a "fierce offensive to reoccupy" Aleppo.

Aleppo has been divided roughly in half by the government and opposition since mid-2012, when rebel fighters launched an offensive to gain control of northern Syria.

However, in the past few weeks the army has secured the area around the city's international airport and retaken the strategically important Base 80 nearby. Troops have also captured the towns of Safira and Tal Aran.

Despite the rebel losses, Saleh was resolute in an interview with Opposition Orient Television last week, insisting: "We will not let Iran and Hezbollah advance except over our dead bodies."