The blast occurred at around 5:30 a.m. local time, and a bus engine fault was likely to blame for the incident, Siem Reap provincial police chief Major General Teng Channath said.

"According to our preliminary investigation, a bus's engine accidentally exploded, leaving two people injured -- one slightly injured and another seriously wounded," he told Xinhua via telephone.

Three buses were damaged in the incident, Channath said, adding that police cordoned off the area as a further probe is underway.

Angkor Wat is one of the key temples in the 401-square-km Angkor Archaeological Park, which was inscribed on the World Heritage List of the United Nations Educational, Scientific and Cultural Organization in 1992.

(With UNI Inputs)