Thailand's prime minister will travel to Malaysia on Saturday to sign a ceasefire deal with Cambodia and meet with U.S. President Donald Trump, but will cut short his attendance at the ASEAN Summit there due to the death of the Thai Queen Mother Sirikit.

The president arrived in Japan on Monday for his second stop of the planned three-nation Asia tour. He will head to South Korea next.

Thailand and Cambodia have signed an expanded ceasefire agreement during a ceremony attended by President Donald Trump.

South Korea issued a "code-black" travel ban for parts of Cambodia on Wednesday and dispatched a team of high-level officials to help nationals lured into working in scam compounds and secure the release of those held against their will.

Cambodian and South Korean officials agreed Thursday to cooperate in combating online scams, after the death of a South Korean student who was reportedly forced to work in a scam center in Cambodia triggered public outrage in South Korea.