Trump says to meet families of Americans killed in Syria

US President Donald Trump made a suprise announcement Saturday he would be traveling to meet the families of four US personnel killed in northern Syria.

He tweeted: "Will be leaving for Dover to be with the families of 4 very special people who lost their lives in service to our Country!" Dover refers to Dover Air Force Base in Delaware.

Nineteen people including the four Americans were killed in a suicide bombing on a small restaurant in the flashpoint northern Syrian town of Manbij on Wednesday.

The attack, claimed by the Islamic State group, was the deadliest to hit US troops since they deployed to Syria in 2014.

It came after Trump's shock announcement last month that he was ordering a full troop withdrawal from the country because the jihadists had been "largely defeated."