The Trump administration dispatched its top officials to Turkey on Wednesday for emergency talks to try to persuade Ankara to halt an assault on northern Syria, while Russian troops swept into territory abandoned by Washington in a sudden retreat. Robert O’Brien, White House national security adviser since last month, arrived in Turkey aiming to meet Foreign Minister Mevlut Cavusoglu on Wednesday. Vice President Mike Pence and Secretary of State Mike Pompeo are expecting to meet the following day with President Recep Tayyip Erdogan. The administration is trying to contain the fallout from Erdogan’s decision to send forces last week to attack Syrian Kurdish factions that were Washington’s close allies. Erdogan again insisted there would be no ceasefire, and said he might call off a visit to the United States next month because of the “very big disrespect” shown by US politicians. He also denounced the United States for taking the “unlawful, ugly step” of imposing criminal charges against a Turkish state bank over allegations it broke sanctions on Iran. Turkey’s assault, launched after a call between Erdogan and President Donald Trump, forced Washington to abandon a strategy in place for five years and pull its troops from northern Syria. It has spawned a humanitarian crisis, with 160,000 civilians taking flight, a security alert over thousands of ISIS fighters abandoned in Kurdish jails, and a political maelstrom at home for Trump, accused by congressional leaders, including fellow Republicans, of betraying loyal US allies, the Kurds. Syrian regime forces, backed by Washington’s adversaries Russia and Iran, have meanwhile taken advantage of the power vacuum left by retreating US troops to advance swiftly into the largest swath of territory previously outside their grasp. Trump played down the crisis on Wednesday, saying the conflict was between Turkey and Syria and that it was “fine” for Russia to help its ally Damascus. Sanctioning Turkey would be better than fighting in the region, he said. Washington announced sanctions to punish Turkey on Monday, but Trump’s critics said the steps, mainly a steel tariffs hike and a pause in trade talks, were too feeble to have an impact. The Turkish advance, and Washington’s need to swiftly evacuate its own forces, have brought the two biggest militaries in NATO close to confrontation on the battlefield. Washington has complained about Turkish artillery fire near its troops. In the latest potential flashpoint, US military aircraft made a “show of force” over the border city of Kobani after Turkish-backed fighters came close to American troops there, a US official said, according to Reuters. Pence said Erdogan had promised Trump by phone that Turkey would not attack Kobani, a strategically important border city where US forces first came to the aid of Kurds against ISIS, which massacred Kurdish civilians there in 2014. Erdogan said he had not broken his promise to Trump: “Mr. Trump’s remark on Kobani was ‘Don’t strike there’,” he told reporters late on Tuesday. “We said that we had only done an encircling operation there at the moment.” Washington’s hasty exit has created a land rush between Turkey and Russia - now the undisputed foreign powers in the area - to partition the formerly US-protected Kurdish area. The Syrian Observatory for Human Rights, which monitors the eight-year Syrian war, said on Wednesday Russian troops had crossed the Euphrates River to advance to Kobani’s outskirts. Lebanon’s al-Mayadeen TV reported that Russian-backed Syrian forces had also set up outposts in Raqqa, the one-time ISIS stronghold, which the Kurds captured in 2017 at the peak of their campaign with US support. Hours after Washington announced its pullout on Sunday, the Kurds made a rapid deal with Washington’s adversaries, the Russia- and Iran-backed regime of Bashar Assad. Russia-backed Syrian troops have swiftly moved across the breadth of the Kurdish-held area including Manbij city, a target of Turkey which US forces said on Tuesday they had quit. Reuters journalists traveling with Syrian regime forces on Tuesday entered Manbij and saw Russian and Syrian flags on buildings nearby. Russian state media said on Wednesday regime forces had occupied bases abandoned by US troops. Erdogan, due in Moscow later this month, said he had told President Vladimir Putin that Russia could move forces into Manbij, provided that the Kurdish People’s Protection Unites (YPG) was cleared out. Erdogan says Trump approved his plan for a “safe zone” about 30 km (20 miles) inside Syria. Trump says he did not endorse the plan but Washington could not stay to police the Middle East.