Thailand's army has accused Cambodia of breaking a newly signed ceasefire deal just days after it took effect. The Thai army detected over 250 unmanned aerial vehicles (UAVs) flying from Cambodia on Sunday night. The ceasefire started at noon on Saturday and was meant to freeze front lines, stop reinforcements, and let civilians return home. This agreement came after weeks of deadly border clashes that forced nearly one million people to flee. The Royal Thai Army said Cambodia's drone flights "constitute provocation and a violation of measures aimed at reducing tensions" and called the action "inconsistent" with the ceasefire terms. It also warned it "may need to reconsider" releasing 18 Cambodian soldiers held since July if violations continue. Cambodia has not responded yet. The ceasefire deal had strong diplomatic backing from China and the US. China's Foreign Minister Wang Yi called it "hard-won," while US President Donald Trump praised the "rapid and fair conclusion." The Thailand-Cambodia conflict is over a border dispute that dates back more than 100 years. Tensions rose this year after Cambodian women sang patriotic songs at a disputed temple, followed by a deadly clash in May. The fighting left dozens dead and displaced thousands. A fragile ceasefire was signed in October after ongoing violence, but fresh clashes earlier this month collapsed the truce. Both sides blame each other for breaking the peace agreement.