New flashpoints emerged as both sides said they were acting in self-defense in the worst fighting between the neighbors in 13 years.

Thailand and Cambodia exchanged fire along their disputed border for a second day on Friday, officials from both countries said, with more than a dozen people reported killed and more than 135,000 civilians evacuated.

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.

A major escalation in fighting between Thailand and Cambodia prompted mass evacuations from border areas Friday.

Acting Thai Prime Minister Phumtham Wechayachai accused Cambodia of laying new landmines in the disputed area, resulting in an injury to a Thai soldier.