Thailand, Cambodia have agreed to an unconditional cease-fire, to be effective midnight Monday, talks mediator Malaysia's Prime Minister Anwar

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.

At least 12 have been killed in violent tensions along the disputed border separating Thailand and Cambodia. This follows a flare-up in May in which troops exchanged fire.