Syria's main opposition alliance, the National Coalition, has elected a new president.

Hadi al-Bahra, the coalition's chief negotiator at the failed Geneva II peace talks with the Syrian government, was chosen at a meeting in Turkey.

Like Ahmed al-Jarba, whom he replaces, he has close ties to Saudi Arabia.

Though the coalition is backed by the US and Gulf Arab states, it has little influence over the rebels trying to topple President Bashar al-Assad.

The hardline Islamist and jihadist fighters that dominate the rebel movement reject the alliance's exiled leadership.

One group, the Islamic State in Iraq and the Levant (Isis), has announced the creation of a "caliphate" in the territory under its control in northern and eastern Syria, as well as in the large swathes of neighbouring Iraq.

Meanwhile, at least 14 people, including several women, were killed overnight by rebels in the village of Khatab in Syria's Hama province, state media and activists said.

The Syrian Observatory for Human Rights said the rebels had accused residents of the Sunni village of collaborating with the government.

The Syrian Minister of Justice, Najm al-Ahmed, ordered a judicial inquiry into the attack, describing it as "a terrorist crime", the AP news agency reports.