SINGAPORE, June 27 (Xinhua) — Singapore Prime Minister Lee Hsien Loong said he "felt relieved" that all passengers onboard a Singapore Airlines (SIA) plane were safely disembarked after it caught fire while making an emergency landing at Changi Airport early Monday.

PM Lee stressed that Civil Aviation Authority of Singapore and the carrier will find the root cause of the incident.

"Thanks to SQ and Changi Airport for the swift response. SQ and CAAS are investigating the cause, and will get to the bottom of the matter," said PM Lee in his Facebook.

Flight SQ368, a Boeing 777-300ER, departed from Singapore to Milan, Italy at around 2: 05 a.m., but returned to the city state because of an engine oil warning message. The aircraft's right engine caught fire after the plane touched down at Changi Airport at around 6: 50 a.m. on Monday.

The fire was put out quickly and no injuries to the 222 passengers and 19 crew onboard were reported, announced SIA via its Twitter.

All passengers subsequently were disembarked from the plane and transferred to another aircraft. The carrier is working with authorities to investigate the cause, said SIA.