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, despite international calls for a ceasefire.

Thailand and Cambodia's leaders agreed to an "unconditional" ceasefire Monday, after five days of combat along their jungle-clad frontier that has killed at least 36 people.

Thailand and Cambodia's leaders opened peace talks Monday in Malaysia, seeking a ceasefire after five days of combat along their jungle-clad frontier that has killed at least 35 people.