PHNOM PENH - Cambodia "categorically denies" Thailand's allegation that new landmines have been laid at border areas, the Cambodian Foreign Ministry said late Monday.

"The Royal Government of Cambodia categorically denies the allegations by Thailand that new landmines have been laid by Cambodia at the border with Thailand," the ministry said in a statement.

The statement added that it is important to note that most minefields, from nearly three decades of Cambodia's civil wars, along the Cambodia-Thailand border have not yet been cleared due to difficult terrains and the undemarcated status of the border areas.

The Cambodian government is gravely concerned about Thailand's decision to halt the joint peace declaration, said the statement, adding "Cambodia remains committed to implementing the Joint Declaration."

ALSO READ: Cambodia, Thailand sign joint declaration on peace

Thailand's Prime Minister Anutin Charnvirakul ordered a halt to the joint peace declaration on Monday, following a landmine explosion near Preah Vihear temple at the border area, injuring two Thai soldiers.

The decision comes weeks after the two Southeast Asian neighbors signed a joint peace declaration at the ASEAN Summit on Oct 26.