Islamic State tightens grip on Iraq-Syria border

A tribal leader says Islamic State militants have seized another town in Iraq's western Anbar province, less than a week after capturing the provincial capital, Ramadi. 

Sheikh Rafie al-Fahdawi said Friday that the small town of Husseiba fell overnight. He says police and tribal fighters withdrew after running out of ammunition. 

Husseiba is about seven kilometers (four miles) east of Ramadi, where IS militants routed Iraqi forces in their most significant advance in nearly a year. 

IS consolidated its control of the Iraq-Syria border Friday after capturing an Iraqi provincial capital and a Syrian heritage site in an offensive that has forced a review of US strategy.  

The extremists, who now control roughly half of Syria, reinforced their self-declared "caliphate" with the capture of the Al-Tanaf to Al-Walid crossing on the Damascus-Baghdad highway late on Thursday.   

It was the last border crossing with Iraq still held by the Damascus government. Except for a short section of frontier in the north under Kurdish control, all the rest are now held by IS.  

The militant surge, which has also seen them capture Anbar capital Ramadi and the ancient Syrian city of Palmyra in the past week, comes despite eight months of US-led air strikes aimed at pushing them back.  

It has sparked an exodus of tens of thousands of fearful civilians in both countries and raised fears that the extremists will repeat at Palmyra the destruction they have already wreaked at ancient sites in Iraq.  

President Barack Obama played down the IS advance as a tactical "setback" and denied the US-led coalition was "losing" to IS.  

But French President Francois Hollande said the world must act to stop the extremists and save Palmyra.   

UNESCO chief Irina Bokova called the 1st and 2nd Century ruins "the birthplace of human civilisation", adding: "It belongs to the whole of humanity and I think everyone today should be worried about what is happening."  

As the militant fanned out across Palmyra on Thursday, they went door to door murdering suspected loyalists of the Damascus government, the Syrian Observatory for Human Rights said.  

At least 17 people were killed, the Britain-based monitoring group said.  

Syrian state media said loyalist troops withdrew after "a large number of IS terrorists entered the city," which lies at a strategic crossroads between Damascus and the Iraqi border to the east.  

IS proclaimed Palmyra's capture online and posted video and stills footage of its fighters in the city's air base and prison, long notorious for its detention of regime opponents. 

IS sparked international outrage this year when it blew up the ancient Assyrian city of Nimrud in northern Iraq. 

Syria's antiquities director Mamoun Abdulkarim said he feared a similar fate awaits Palmyra, and urged the world to "mobilise" to save it.  

Half of Syria 

IS now controls "more than 95,000 square kilometres (38,000 square miles) in Syria, which is 50 percent of the country's territory," the Observatory said.  

Fabrice Balanche, a French expert on Syria, said "IS now dominates central Syria, a crossroads of primary importance" that could allow it to advance towards the capital and third city Homs.  

Matthew Henman, head of IHS Jane's Terrorism and Insurgency Centre, said the IS advance boosted its claim to be the most effective of the armed groups fighting to overthrow President Bashar al-Assad. 

"It reinforces IS's position as the single opposition group that controls the most territory in Syria," he said. 

The rivals of IS, Al-Qaeda affiliate Al-Nusra Front, have also been on the offensive as part of a rebel alliance that has stormed through nearly all of the northwestern province of Idlib.  

The Islamist rebels on Friday overran a hospital in the town of Jisr al-Shughur where at least 150 regime forces and dozens of civilians were trapped for nearly a month, the Observatory said.   

It said dozens managed to escape but despite a pledge from President Bashar al-Assad to rescue them, others were killed.  

Palmyra's takeover came days after IS seized the Iraqi city of Ramadi, their most significant victory since their lighting advance across swathes of northern Iraq last summer.  

On Thursday, IS pushed further and seized Iraqi positions east of Ramadi, officials said.   

Obama blamed the fall of Ramadi on a lack of training and reinforcements for the city's garrison.  

"I don't think we're losing," he told news magazine The Atlantic.  

"The training of Iraqi security forces, the fortifications, the command-and-control systems are not happening fast enough in Anbar, in the Sunni parts of the country."  

One of Iraq's leading Sunni Arab politicians, Deputy Prime Minister Saleh Mutlaq, called for a change of US strategy.  

Recruiting Sunni tribes is "important but not enough," he said, adding that in any case it was "too late".