Cambodia called on Thailand Thursday to return 20 soldiers it said were taken captive hours after a ceasefire to halt the neighbours' bloodiest border clashes in decades. The two countries agreed a truce on Tuesday following five days of clashes that killed at least 43 people on both sides -- the latest eruption of a long-standing dispute over contested border temples on their 800-kilometre (500-mile) frontier.

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.

Thailand and Cambodia exchanged allegations on Wednesday of breaching a ceasefire deal which has largely halted the open combat that engulfed their