Thailand and Cambodia traded accusations Saturday of fresh attacks as deadly border clashes entered a third day, leaving at least 33 people dead and more than 168,000 displaced, as international pressure mounted on both sides to reach a ceasefire.

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday as their worst fighting in over a decade intensified and spread to new areas.

The U.N. Security Council planned to hold an emergency meeting in New York on the crisis, while Malaysia, which chairs a regional bloc that includes both countries, called for an end to hostilities and offered to mediate.

Fighting on the Thai-Cambodian border extended into a third day and new flashpoints emerged on Saturday as both sides said they had acted in self-defence in the border dispute and called on the other to cease fighting and start negotiations.

U.S. President Donald Trump said on Saturday he was calling the leaders of Cambodia and Thailand to press for a ceasefire as fighting along the border continued into a third day. "The call with Cambodia has ended,

BANGKOK -- Armed clashes have broken out between Thailand and Cambodia in long-disputed border areas, rapidly escalating months-long tensions.

"The U.S. already flunked the test and that should be a wakeup call," a former senior U.S. State Department official told Newsweek.

By Shoon Naing SURIN, Thailand (Reuters) -Six-year-old Sunisa Chanprakhon was looking forward to running in her school sports day in their Thai border village on Thursday when explosions shattered the morning calm.