BANGKOK, Dec. 29 -- Thailand stands ready to assist the Indonesian government "in any way possible" with the search for a missing AirAsia plane with 162 people on board, Thai Prime Minister Prayut Chan-o-cha said on Monday.

"I have instructed all relevant ministries to be on standby to assist promptly in the ongoing search and rescue operations," Prayut said.

Flight QZ8501 disappeared en route from Indonesia to Singapore on Sunday after the pilot requested his flight plan be changed due to stormy weather.

No significant result has been found in the second-day search for it on Monday.

"At this difficult time, our thoughts and prayers go out to all passengers and crew members of the AirAsia flight QZ8501 and their families," Prayut said.