Another US defense official, also speaking on condition of anonymity because of the sensitivity of the issue, said that the Pentagon "obviously" told Turkey where US troops are and "they certainly go closer than we would have liked" in the incident outside Kobane.
Secretary General of the Arab League Ahmed Abou El Gheit said in his speech at the meeting that the league condemns the Turkish aggression on Syria and that Turkey seeks to alter the ethnic nature of the attacked area.
Turkish forces captured a key Syrian border town under heavy bombardment Saturday, the Turkish military and a Syrian war monitor said, as Turkey's offensive against Syrian Kurdish fighters pressed into its fourth day with little sign of relenting despite mounting worldwide criticism.
"These wars, they never end", Trump said.
CNN is reporting that shells landed within "several hundred" meters of an American position.
American military planners believe Turkey is intent on eventually gaining control of a wide swath of Syrian territory near its border.
CNN also highlighted comments on Twitter from Brett McGurk, the former presidential envoy to the global coalition to counter the Islamic State (ISIS) who is now a foreign affairs analyst for NBC News and MSNBC.
"All necessary precautions were taken so as not to damage the United States post".
'Based on all the facts available, these were warning fires on a known location, not inadvertent rounds'. "There is absolutely no shooting of the US and the Coalition".
Kurdish forces in northern Syria have been a USA partner in the fight against IS, but Turkey considers them to be terrorists. A senior Pentagon spokesman said the Turkish bombardment was so heavy that United States forces chose to return fire for self-defense.
The US says it has already plucked two of the most high-profile IS jihadists to have been captured and spirited them out of Syria.
An AFP correspondent in the area said Turkish troops and allied Syrian rebels had entered the town but had yet to capture it.
Omar said it has been involved in the autonomous administration for northern Syria. Turkey is moving in to take control of it. "We call on our allies to fulfil their duties and assume their moral obligations", it said.
Turkey's Defense Ministry said it had taken all measures to ensure that no USA base was damaged while it responded to harassment fire that originated near a US base close to Kobane.
The move immediately raised concerns that the United States was abandoning Syrian Kurds, who have been the closest U.S. partner in counter-terrorism operations against the Islamic State.
The Syrian Observatory for Human Rights, which tracks Syria's civil war, said 74 Kurdish-led Syrian Democratic Force fighters have been killed since Wednesday as well as 49 Syrian opposition fighters backed by Turkey.
"We can only take pride in the fact that governments, which did not mind the terrorist organization PKK's occupation of a predominantly Arab area, the displacement of Arab civilians from their lands, or the destruction of Arab villages, are unsettled by #OperationPeaceSpring", he said.
The U.S. has insisted that it has not abandoned the Kurds in the area and has called for a protection of civilians and diplomatic measures on Turkey's part.
Foreign Minister Mevlut Cavusoglu also dismissed an offer by U.S. President Donald Trump to mediate between Ankara and Kurdish YPG forces. An SDF spokesperson said Friday that five ISIS prisoners escaped a facility in Qamishli city, renewing fears about a resurgence of the terrorist group because of Turkey's operation.