BEIRUT/WASHINGTON Islamic State fighters were on the retreat in the strategic Syrian city of Palmyra on Friday, as the United States said it likely killed several senior leaders of the militant group this week including its top finance officer.
The double blow to the hardline Islamist group in its self-declared caliphate, which covers huge areas of Syria and Iraq, came three days after Islamic State suicide bombers killed 31 people in Brussels, the worst such attack in Belgian history.
Syrian soldiers fighting to retake the desert city of Palmyra from Islamic State forces recaptured its old citadel on Friday, various media reported. The citadel overlooks some of the most extensive ruins of the Roman empire.
Many of Palmyra's temples and tombs have been dynamited by Islamic State fighters in what the United Nations described as a war crime, although television footage on Friday showed at least some colonnades and structures still standing.
The recapture of Palmyra, which the Islamist militants seized in May 2015, would mark the biggest reversal for Islamic State in Syria since Russia's intervention turned the tide of the five-year conflict in President Bashar al-Assad's favour.
The city controls routes east into the heartland of territory held by the militants, including the province of Deir al-Zor and the Islamic State's de facto capital, Raqqa.
The Syrian Observatory for Human Rights monitoring group said on Friday an Islamic State leader was killed when his car was targeted in a strike on Raqqa on Thursday night.
It did not identify the dead militant, but U.S. Defense Secretary Ash Carter said the United States believed it killed Haji Iman - an alias for Abd ar-Rahman Mustafa al-Qaduli, a senior Islamic State leader in charge of the group's finances, and Abu Sarah, who Carter said was charged with paying fighters in northern Iraq.
U.S. special forces carried out the strike against Haji Iman, officials told Reuters. One of the officials said the plan was to capture, not kill, him. But after the commandos' helicopter was fired on, the decision was made to fire from the air.
"We are systematically eliminating ISIL's cabinet," Carter told reporters at a briefing at the Pentagon, using an acronym to refer to the group.
U.S. Marine General Joseph Dunford, chairman of the Joint Chiefs of Staff, told the briefing the deaths reflected "indisputable" new momentum in the fight against Islamic State.
Iraq's military said on Friday that Iraqi Yazidi and tribal fighters had taken a border area in the Sinjar region next to Syria from Islamic State, cutting an important supply line for the militants.
U.S. officials said they were helping Iraqis prepare for a major operation in Mosul to take back more territory from the militant group.
The scale of Friday's fighting for Palmyra reflected how much of a strategic prize the city represents, with jets launching dozens of air strikes and soldiers firing mortar barrages, while Islamic State fighters hit back with two car bombings.
Russian warplanes have continued to back up the Syrian army and its allies, despite Moscow's recent announcement it was withdrawing the bulk of its military forces.
Its planes carried out 41 sorties from Tuesday to Thursday in support of the Palmyra offensive and destroyed 146 targets, Russian news agencies reported on Friday, citing the Russian Defence Ministry.
Beirut-based television channel Al-Mayadeen, broadcasting from the edge of Palmyra, showed a low-flying jet carry out three air strikes against what it said were Islamic State fighters withdrawing from the old citadel back into Palmyra.
"Army units took control over Palmyra's ancient citadel ... after dealing with the last Daesh terrorist groups," state news agency SANA said.
A ceasefire backed by the United States and Russia covers most of Syria but not areas held by Islamic State. The first truce of its kind since the war began five years ago has been accompanied this month by the first peace talks attended by Assad's government and most of the groups opposed to him. Damascus in the meantime has turned its fire on Islamic State.
Moscow is the main ally of Assad's government, while Washington and other Western countries have backed foes trying to overthrow him during the civil war that has killed 250,000 people and led to the world's worst refugee crisis.
Both powers are committed to fighting Islamic State and have backed a new diplomatic push to end fighting on other fronts.
A Russian special forces officer was killed in combat near Palmyra in the last week, Interfax said, suggesting the Kremlin had been more engaged in the Syrian conflict than it had acknowledged.
'JOY AFTER TRAGEDY'
Syria's antiquities chief, Maamoun Abdulkarim, said driving Islamic State out of Palmyra would be a victory for the whole world.
"After all the tragedy we have suffered in Syria for five years, and the 10 months in Palmyra after it fell ... it's the first time we feel joy," Abdulkarim told Reuters.
"We pray for victory soon, so that the damage is limited. Palmyra, under their control, was the loss of a civilisation."
U.N. envoy Staffan de Mistura has set out a blueprint for a political process aimed at ending the civil war, and said on Thursday that talks would tackle the divisive issue of a postwar transition when the warring sides gather again next month.
Progress has been slow, with the government delegation and its opponents disagreeing fundamentally on the terms of such a transition, including whether Assad must leave power.
After talks in Moscow on Thursday, Russia and the United State said they agreed to use their influence over both sides in the conflict to speed things up.
Interfax quoted Russian Deputy Foreign Minister Sergei Ryabkov on Friday as saying Washington now understood Moscow's position that Assad's future should not be discussed at the moment.
But U.S. State Department spokesman John Kirby said in a statement: "Any suggestion that we have changed in any way our view of Assad's future is false. Assad has lost his legitimacy to govern. We haven't changed our view on that."
(Additional reporting by Susan Heavey, Phil Stewart and Jonathan Landay in Washington, Maher Chmaytelli in Baghdad, Kinda Makieh in Damascus and Mostafa Hashem in Cairo; Editing by John Stonestreet and Peter Cooney)
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Updated Date: Mar 26, 2016 09:45 AM