Trump has also said that he would "make a phone call" to stop the fighting, which is the most serious escalation since clashes in July killed dozens of people. The US has asked Thailand and Cambodia to "cease hostilities immediately" as border clashes extended for a third day, killing at least 10 people and displacing hundreds of thousands. The death toll over three days of hostilities stands at 10 - seven from Cambodia and three from Thailand. In October, Trump claimed a historic achievement in ending the border conflict after both sides signed a ceasefire agreement, but tensions have continued to simmer. This week, several countries, including the UK, US and Japan, have issued warnings against travelling to the border areas citing the renewed fighting.