Cambodian and Thai troops exchanged fire at the 11th century Preah Vihear temple on disputed border Tuesday afternoon, sources said.

"The fighting started at 1:40 p.m. at the disputed area near Preah Vihear temple," brigadier general Thul Sovan, deputy commander of Cambodian Military Division 3, stationed at the frontline near Preah Vihear temple, told Xinhua by telephone on Tuesday.

This marks the fifth straight day of fighting between Cambodian and Thai troops on the disputed border after the four-day clashes on April 22-25 near the 13th century Ta Moan temple and Ta Krabei temple in Oddar Meanchey province, which lie 150 kilometers west of Preah Vihear Temple.

It's unknown who triggered the clash Tuesday and the casualties remained unclear.