Both sides blamed each other for triggering the violence along at least six spots on their shared border, with Cambodian Prime Minister Hun Manet calling Bangkok’s action “unprovoked, premeditated and deliberate” in a letter to the United Nations Security Council, which will hold an emergency meeting on Friday to discuss the violence.

Meanwhile, Thailand on Friday accused Cambodia of striking first and targeting civilians, including in a hospital in Surin province. The health ministry said 14 people and a soldier had died so far.

The Thai interior ministry said about 138,000 people from four border provinces had been evacuated to temporary shelters.

In Oddar Meanchey province, a Cambodian official said on Friday one civilian was killed and five more wounded in cross-border strikes by Thailand.