30,000 flee clashes between jihadists, rebels in Syria: HRW

IS fighters seize a string of opposition-held villages near Syria's border with Turkey

At least 30,000 civilians have fled fighting between jihadists and rebels in northern Syria in the past 48 hours, Human Rights Watch said, calling on Turkey to open its border to them.

The watchdog accused Turkish border guards of shooting at some of those displaced in Aleppo province by fighting between the Islamic State (IS) group and opposition rebels as they approached the frontier.

"As civilians flee ISIS fighters, Turkey is responding with live ammunition instead of compassion," said HRW researcher Gerry Simpson, using another acronym for the jihadists.

"The whole world is talking about fighting ISIS, and yet those most at risk of becoming victims of its horrific abuses are trapped on the wrong side of a concrete wall."

HRW said many of those who fled were residents of emergency camps set up along the border who headed for other camps or nearby towns and villages even though they were still unsafe.

It comes as escalating fighting between Russian-backed regime fighters and rebels around the provincial capital Aleppo city threatens a nearly seven-week ceasefire that had seen violence drop significantly for the first time in the five-year conflict.

IS and other jihadist groups are excluded from the truce.

Representatives of Syrian President Bashar al-Assad's regime are expected in Geneva on Friday for the latest round of talks aimed at ending the war, which has killed more than 270,000 people and displaced half the population.

- Escalating Syria violence threatens ceasefire -

Fighting escalated around Syria's second city Aleppo on Thursday, as a Russian-backed government offensive strained a landmark ceasefire and threatened a new round of peace talks in Geneva.

Government fighters, rebels and jihadists battled for control of swathes of Aleppo province, threatening a nearly seven-week ceasefire that had seen violence drop for the first time in the five-year conflict.
Regime loyalists backed by Russian air power pressed a fierce offensive just north of the provincial capital of Aleppo city, said the Syrian Observatory for Human Rights.

Fighting was heaviest around Handarat, a hilly area that lies along a route leading north out of opposition-held parts of the city.

Observatory head Rami Abdel Rahman said regime forces, backed by Russian and Syrian planes, were seeking to cut off that road and "completely besiege" eastern neighborhoods.

An AFP correspondent in opposition-held eastern Aleppo city said the booming crashes of strikes could be heard throughout the day, but no raids hit the city itself.
"We're overwhelmed once again by fears of a government siege of Aleppo, after weeks of a ceasefire that may have just collapsed," said Ali Saber, a 32-year-old father of one living in Aleppo.
The assault has sparked "strong concerns" in Washington about the ceasefire, which saw violence plummet after it took effect on February 27.
A senior US administration official said the offensive "could well violate the cessation of hostilities, which has... been under increasing pressure in recent weeks".
European Union foreign policy chief Federica Mogherini also expressed concern about the Aleppo offensive and called for the "respect, consolidation, and expansion" of the truce.
Representatives of Bashar al-Assad's regime are expected in Geneva on Friday for peace talks with UN envoy Staffan de Mistura, who criticized the government for hindering efforts to deliver life-saving assistance to Syrians in need.

- 'Disappointing' aid situation -

President Vladimir Putin, Assad's main backer, said during an annual call-in show on Russian TVB on Thursday that he was "closely following" the latest spike in violence.
Putin last month announced a partial pullout from Syria, but warned Russia could return in full force should the situation require it.
The UN fears that the humanitarian situation may deteriorate once again after reporting significant progress through the first two weeks of March.
"We are extremely concerned about the situation in northern Syria, including Aleppo governorate, where there has been a significant increase in incidents of violence that continue to aggravate the humanitarian situation," a UN humanitarian official told AFP.
The official said the UN was planning several aid deliveries to Afrin and Azaz -- two flashpoint areas in the province -- in the coming days.
But UN envoy de Mistura said restrictions by Damascus have frustrated efforts to deliver much-needed assistance to besieged Syrians.

Despite several UN Security Council resolutions that call for unobstructed aid access to besieged areas, the regime continues to frequently deny passage to convoys carrying assistance.

"Everyone in the meeting was disappointed," de Mistura told reporters after a weekly meeting of the so-called humanitarian taskforce on Thursday.

"Many of (the countries) are actually frustrated by the lack of new convoys," he added, naming Douma and Daraya, both besieged by the regime near Damascus, as being in dire need of aid.

De Mistura said he made some progress in Damascus by securing tentative permission to distribute medical supplies.

But he said that the government had specifically excluded surgical equipment, anti-anxiety pills and atropine, which can be used to guard against poison -- including sarin gas.