Reports from the ground in Afghanistan describe people being crushed by crowds trying to get in.
The Taliban have issued a statement to those looking to leave the country.
At least four small rockets struck near the U.S. Embassy in Baghdad and an Iraqi base hosting U.S. troops Sunday morning.
U.S.-backed Iraqi army units on Wednesday took control of the last major road out of western Mosul that had been in Islamic State's hands, trapping the militants in a shrinking area within the city, a general and residents said.
The Taliban forces have entered the city of Kabul this morning as the President of Afghanistan is evacuated and has left the country.
While the US news media goes crazy over the withdrawal of the remaining 50 military advisors remaining in Syria, it is important to note that Syria has never asked them to be there.
Russian-backed Syrian government forces and their allies fought their way into Palmyra on Wednesday, driving back Islamic State militants who have held the historic city since December, the Syrian Observatory for Human Rights monitoring group reported.
A Hezbollah-run media outlet earlier reported that the Syrian army and its allies had recaptured the Palmyra citadel, on the city's western outskirts, and seized a modern palatial complex to the southwest.
Islamic State has captured Palmyra, whose ancient ruins are a UNESCO World Heritage Site, twice during Syria's six-year conflict.
The army recaptured the city from the ultra-hardline group in March last year, but Islamic State seized it again in December.
The group has razed ancient monuments during both of its spells in control of Palmyra - destruction the United Nations has condemned as a war crime.
A Syrian military source told Reuters earlier on Wednesday: "The army's entry to the city will begin very soon."