The civilian death toll from the Turkish military offensive in north-eastern Syria has risen to 14, according to the Syrian Observatory for Human Rights war monitor.

The report comes a day after Turkey agreed to suspend its military campaign for five days. Turkey said it will end the assault if Kurdish-led forces pulled out from a safe zone along the border.

Turkish President Tayyip Erdogan denied that there were any ongoing confrontations.

The monitor estimates that more than 300,000 civilians have been displaced within Syria since the start of the assault, calling it one of the largest upheavals since Syria's civil war began in 2011.

Nearly 500 people have been killed so far, the majority on the Kurdish side, according to the monitor.

However, President Erdogan warned that the campaign will continue if the United States does not ensure that Syrian Kurdish fighters leave the safe zone by Tuesday.

Turkey considers YPG militants to be an extension of the banned Kurdistan Workers' Party (PKK) – a group that has been involved in an armed conflict against the Turkish government for 35 years.

President Erdogan wants to destroy Kurdish hopes of an autonomous enclave that Turkey fears could serve as a launchpad for attacks on its soil.

He also wants to resettle some of the 3.6 million Syrian refugees Ankara is hosting.