TV cameras are seen on a hilltop in Ceylanpinar, Sanliurfa province, southeastern Turkey, as in the background smoke billows from fires in Ras al-Ayn, Syria. Turkey's defense minis...
AP Photo/Lefteris Pitarakis
In this photo taken from the Turkish side of the border between Turkey and Syria, smoke billows from targets in Ras al-Ayn, Syria, during bombardment by Turkish forces. Turkey's Pr...
AP/PTI
In this photo taken from the Turkish side of the border between Turkey and Syria, in Ceylanpinar, Sanliurfa province, southeastern Turkey, flames and smoke billow from a big fire i...
AP Photo/Lefteris Pitarakis
In this photo taken from the Turkish side of the border between Turkey and Syria, in Ceylanpinar, Sanliurfa province, southeastern Turkey, Turkish forces fire rockets towards targe...
AP Photo/Lefteris Pitarakis
A local resident uses his mobile to take photos of the damages on a house, caused by a mortar fired from inside Syria, on the Turkish town of Akcakale, southeastern Turkey.
AP Photo/Lefteris Pitarakis
Protesters carrying a sign reading "Erdogan=IS" referring to Turkish President Recep Tayyip Erdogan take part of a demonstration in support of Kurds being targeted by Turkish force...
AP Photo/Francois Mori
Local residents look on as a convoy of Turkish forces' trucks transporting tanks is driven on a road towards the border with Syria in Sanliurfa province. Turkey's military said it ...
AP Photo/Lefteris Pitarakis
People in Akcakale, Sanliurfa province, southeastern Turkey, at the border with Syria, watch smoke billowing from targets inside Syria, during bombardment by Turkish forces. Turkey...
AP Photo/Lefteris Pitarakis
Turkey's President Recep Tayyip Erdogan speaks to his ruling party officials, in Ankara, Turkey. Erdogan says that there have been 109 "terrorists killed" — a reference to Syrian...
Turkish Presidency Press Service via AP, Pool
In this photo released by the Iranian Revolutionary Guard, missiles are fired from city of Kermanshah in western Iran targeting the Islamic State group in Syria.
Sepahnews via AP
In this photo released by the Iranian Revolutionary Guard, a missile is fired from city of Kermanshah in western Iran targeting the Islamic State group in Syria. Iran's paramilitar...
Sepahnews via AP
A man walks just meters away from where the alleged chemical weapons attack occurred in the town of Douma, the site of a suspected chemical weapons attack, near Damascus, Syria. Th...
AP/PTI
Protesters throw eggs to the European Union offices during an anti-war rally in Athens. Thousands took part in the rally following the airstrikes in Syria over the weekend.
AP Photo/Thanassis Stavrakis
Supporters of the Greek Communist party shout slogans during an anti-war protest in Athens. Thousands took part in the rally following the airstrikes in Syria over the weekend.
AP Photo/Thanassis Stavrakis
Pakistani protesters condemn the recent US-led airstrikes against Syria in Lahore, Pakistan. Banner reads "Condemn US, France and Britain attacks on Syria".
AP Photo/K.M. Chaudary
European lawmakers raise placards reading "Stop the War in Syria" in protest against airstrikes launched by the U.S., Britain and France in Syria last week criticizing the legitima...
AP Photo/ Jean Francois Badias
A man rides past destruction in the town of Douma, the site of a suspected chemical weapons attack, near Damascus, Syria. Faisal Mekdad, Syria's deputy foreign minister, said that ...
AP Photo/Hassan Ammar
Supporters of the Greek Communist party try to pull down a statue of U.S. President Harry S. Truman during a protests against U.S.-led airstrikes in Syria, in central Athens. Polic...
AP Photo/Petros Giannakouris
Demonstrators take part in a protest organized by the Stop the War coalition against the British government carrying out airstrikes on targets in Syria, in Parliament Square, Londo...
AP Photo/Matt Dunham
A protestor paints "Hands off Syria" on the street during a protest against the airstrikes on suspected chemical weapons sites in Syria, outside of the U.S embassy in capital Nicos...
The White House has announced that Trump is scheduled to make a major announcement on Sunday at 9:00 am (local time)/ 1300 GMT, but did not give further details.
Trump and President Recep Tayyip Erdogan spoke by telephone on Sunday and 'agreed to ensure coordination between their countries' military, diplomatic and other officials to avoid a power vacuum'.
Islamic State claimed responsibility for the violence, saying "soldiers of the caliphate" attacked Syrian government positions and security outposts in Sweida city, then detonated their explosive belts.