MONROVIA, Liberia - Disputes over land ownership and property boundaries are threatening to undermine Liberia's fragile peace, the nation's reconciliation body and the European Union warned Monday.

The Liberian Truth and Reconciliation Commission and the EU said a six-month survey also found concerns about a lack of information from the government and over management of the country's resources.

But they said land disputes were the biggest threat to peace. "There will remain a strong likelihood of reversion to violence" if such conflicts are not addressed, their report said.

Civil war and a series of coups between 1989 and 2003 left about 200,000 people dead in Liberia and displaced half the country's population of 3 million. Nearly 12,000 U.N. peacekeepers help maintain order in the West African country.

Boundary disputes are "the main source of conflict" cited by some 6,000 people interviewed across 46 of Liberia's 64 electoral districts, according to the summary of the survey findings presented to journalists in the capital, Monrovia.

"People complained about how their lands had been encroached upon; they talked about the issue of boundary demarcation, resale of lands," said Eddie Mulbah, who worked on the survey as a consultant for the European Union's administrative body.

Government spokesmen could not be immediately reached for comment on the findings.

The report also identified a range of other hurdles to stability, including scant communication between the government and citizens, lack of accountability and transparency in resource management and large numbers of unemployed former combatants.

Kahn Karlor, an analyst with Liberia's governance reform commission, welcomed the release of the report, saying it rightly calls on Liberians to find an internal solution to grievances.

"Now that we have brought to an end this bloodletting, killing one another, Liberian people will have to pressure each other" to keep the peace, he said.