Cambodia and Thailand exchanged fire across their disputed border for a fourth day on Sunday, hours after US President Donald Trump announced the two Southeast Asian nations had agreed to ceasefire talks and threatened continued fighting would jeopardize their trade deals with Washington.

The talks, announced by a spokesperson for the Thai prime minister's office on Sunday, come after pressure from U.S. President Trump to reach a ceasefire.

U.S. President Donald Trump said on Sunday he believed both Thailand and Cambodia wanted to settle their differences after he told the leaders of both countries that he would not conclude trade deals with them unless they ended their fighting.