Airstrikes in Syria kill at least 18, stall peace talks

At least 18 people were killed Friday when airstrikes hit several rebel-held neighbourhoods in Syria's contested northern city of Aleppo, anti-government activists said, an escalation that placed added strain on a fragile cease-fire.

Aleppo, Syria's largest city and former commercial centre, has seen sporadic clashes since the cease-fire took effect in late February, as government troops have advanced, boxing in opposition-held areas from all sides except for a corridor from the northwestern edge of the city.

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The British-based Syrian Observatory for Human Rights said at least 19 people were killed in the airstrikes in Aleppo's Bustan al-Qasr neighbourhood and other parts of the city controlled by rebels. The Observatory described the series of airstrikes as the most intense on the city since the cease-fire began. The Local Coordination Committees, an activist-operated media outlet, said at least 18 people were killed in Friday's airstrikes.

The February cease-fire has been teetering amid rising violence, and UN-brokered talks in Geneva to resolve the conflict have been bogged down, with the Saudi-backed delegation, representing rebels opposing the Syrian government, recently suspending its participation.

The High Negotiations Committee, which represents most of the opposition at the UN-brokered talks, accuses the government of repeatedly violating the U.S. and Russian-brokered cease-fire, illegally detaining thousands of people and blocking humanitarian aid access.

Syria's future in 'danger zone'

France's foreign minister Jean-Marc Ayrault warned that the negotiations over Syria's political future have entered a "danger zone."

Speaking with reporters in Paris, he said that humanitarian access to besieged areas "must be total" and that there have been "too many fetters."

The Syrian government's envoy to peace talks in Geneva, Bashar Ja'afari, defended his government's record on humanitarian aid, lashing out at the opposition for shedding "crocodile tears" about alleged lapses.

Ja'afari spoke to reporters at UN offices in Geneva where indirect peace talks and other meetings on Syria's crisis have been held in recent months. He said his delegation will meet with UN mediator Staffan de Mistura again on Monday.

The UN envoy meanwhile said the current round of talks will continue until "probably Wednesday, as originally planned." But he said the two sides are "extremely polarized" and the cease-fire is in trouble.

De Mistura told reporters the hobbled peace process needs support from a group of countries known as the International Syria Support Group, led by the U.S. and Russia, and called on that body to reconvene at ministerial level.

The envoy also took issue with the government's claim that it was not besieging any towns or villages. He said the international community counts 18 priority besieged areas in Syria: 15 under seige by the government, two by the armed opposition, and one by the Islamic State group.

De Mistura acknowledged that his estimate — made on Swiss TV a day earlier — that Syria's five-year war had taken 400,000 lives was "not verified." The UN stopped officially counting the toll at an estimated 250,000 dead several months ago, insisting lack of access prevented the collection of accurate figures.

Syrian, Kurdish fighters clash

Also Friday, a government plane crashed southeast of Damascus, and an Islamic State website said the extremist group, which operates in the area, downed the MIG-23. 

Russia's Interfax news agency, however, quoted a Syrian military source as saying on Friday the crash had nothing to do with ISIS. "The plane had recently undergone repairs... there was no attack from the ground. It crashed because of a technical fault. The pilot ejected," Interfax quoted the source as saying.

Syrian government forces and Kurdish fighters were meanwhile clashing for a third day in the northeastern city of Qamishli, with at least seven people killed. Lezkin Ibrahim, a Kurdish media activist in Qamishli, said the fighting Friday was concentrated in the city centre, forcing residents to stay indoors and shops to close.

He said Hawar news, the outlet where he works, has recorded 10 civilians and six Kurdish fighters killed. He said the wounded are being taken to neighbouring towns for treatment because local hospitals are blocked by the fighting.

The Observatory, which monitors the conflict through activists on the ground, said the clashes killed seven, including a child and a woman.

Kurdish forces, who have carved out a zone of semi-autonomy in northern Syria, seized the Alaya prison in Qamishli on Thursday after government forces inside it surrendered.

Ibrahim said the fighting started after government forces attacked a Kurdish security patrol, killing two of its members on Tuesday. He said the government has shelled the city for the first time, and that government helicopters flew over the city on Friday.

Rockets from Syria hit Turkey   

A Turkish news agency says rockets fired from Syria have hit southern Turkey, killing two people and wounding four others.

The state-run Anadolu Agency says two rockets struck Kilis, a town just a few kilometers from the Syrian border, late Friday.

A round of rockets also shook the town in the morning but caused no casualties.

The Syrian conflict periodically spills over into Turkey with stray rockets landing in border towns, sometimes causing fatalities.

The Turkish military normally responds by firing back at targets in Syria, in line with its rules of engagement.

The wider province of Kilis borders areas in Syria that are hotly contested by Syrian anti-government rebels, Kurdish factions, and Islamic State militants.