Awwal 04, 1432 H/Feb 07, 2011, SPA -- Thailand accused Cambodia of refusing to negotiate to resolve a border dispute that led to the fourth straight day of fierce clashes Monday, as Phnom Penh said that only U.N. peacekeepers can stop the fighting near an 11th century temple, according to AP. Cambodia said the crumbling stone temple _ classified as a World Heritage site _ has been heavily damaged during several bursts of artillery fire over four days. The extent of the damage could not be confirmed. The exchange of cross-border fire is highly unusual among members of the 10-member Association of Southeast Asian Nations, and has raised tensions in a region known for its stability. Preah Vihear temple _ which is in northern Cambodia, several hundred feet (meters) from the border with Thailand _ has fueled nationalism in both countries for decades and conflict over it has sparked sporadic, brief battles in recent years. Repeated clashes over several days like this month's have been rare, however. A one-hour clash Monday morning stopped after both sides agreed to an unofficial cease-fire. Fighting has erupted daily since Friday, leaving at least seven dead and dozens wounded. -- SPA