Long-simmering tensions between Thailand and Cambodia escalated to deadly violence on July 24, setting off five days of military clashes at multiple spots along the roughly 800-kilometer (500 mile) border.

Clashes on the Thailand–Cambodia border trigger martial law, disrupt trade flows, and raise investor risk across both economies.

Cambodian defence ministry spokeswoman Maly Socheata said Thursday that talks were under way for the release of 20 soldiers.