The FUNCINPEC - aligned units suffered major casualties the following day .
The FUNCINPEC - aligned units subsequently fled from Phnom Penh to the border town of O Smach in Oddar Meanchey Province .
The FUNCINPEC - aligned units suffered major casualties the following day , and subsequently fled from Phnom Penh to the border town of O Smach in Oddar Meanchey Province .