Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Residents Flee as Turkish, Kurdish Forces Battle for Border Towns Heather Murdock ISTANBUL - NATO is urging Turkey to exercise restraint in its incursion into northeastern Syria. NATO Secretary-General Jens Stoltenberg acknowledged Turkey's legitimate security concerns about the Syrian Kurdish fighters, but warned that the offensive could "jeopardize" progress made against the Islamic State terror group. Stoltenberg spoke at a news conference in Istanbul with Turkish Foreign Minister Mevlut Cavusoglu. Cavusoglu said Turkey expects solidarity from NATO against the threats it faces. Turkey has reported its first military fatality three days into its incursion into Syria. The defense ministry said three other soldiers were wounded, without giving any details. Civilian casualties are also reported, but the numbers are hard to pin down and confirm. Explosions were reported in the northern Syrian border towns of Ras al Ain and Tel Abyad Friday as the Turkish military offensive continued. The International Rescue Committee says 64,000 people have already been displaced and hundreds of thousands of other people could soon become homeless. Both sides report civilian deaths and injuries as mortars are lobbed over the border into Turkey. "Turkish planes have been striking from the air," said Diyar Ahmed, a spokesperson for Syria's Kurdish-led autonomous government in the northeast in a statement on Thursday. "At the same time, their heavy weapons haven't stopped, they aren't stopping in firing on the village, and civilians have been both wounded and lost their lives." .