By Artorn Pookasook and Chantha Lach SISAKET, Thailand/PHNOM PENH (Reuters) -Cambodia and Thailand each said the other had launched artillery attacks across contested border areas early on Sunday, hours after U.

Long-festering tensions over border territory have escalated into armed conflict between Cambodia and Thailand, leading to dozens of deaths on both sides and displacing tens of thousands of people.

Thailand has mobilised gunboats to patrol its province bordering Cambodia as conflict between the two nations enters the third day, with death toll climbing to 33 and tens of thousands seeking refuge.

Thailand and Cambodia traded accusations of fresh attacks Saturday as deadly border clashes entered a third day and international pressure mounted for a ceasefire. The fighting has killed at least 33 people and displaced more than 168,

The tank screeches as it rolls into the ad-hoc military base before four battle-weary soldiers jump out to re-inspect the hefty vehicle.

Thailand and Cambodia exchanged heavy artillery fire for a second day on Friday as border fighting intensified and spread, while Cambodia's leader said Thailand had agreed to a Malaysian ceasefire proposal but then backed down.