Cambodia PM calls on US to withdraw Peace Corps volunteers

Cambodian Prime Minister Hun Sen called on the United States on Friday to withdraw Peace Corps volunteers in an escalating row over accusations that U.S. agents conspired with an opposition leader to plot treason.

Hun Sen was responding after the U.S. embassy in Phnom Penh issued a travel warning that urged citizens to show caution amid "anti-American rhetoric by officials".

"Are you scaring Cambodians?" Hun Sen said of the United States in an address to garment workers at factories which export much of their production to the United States.

"Are you prepared to invade Cambodia and that's why you told Americans to be careful? It's good if you pull out the Peace Corps," Hun Sen said.

The U.S. embassy declined to comment. It has previously dismissed the accusations of collusion with opposition leader Kem Sokha and called for his release.

On Friday, the embassy was swearing in 71 new volunteers from the Peace Corps, which sends Americans abroad to help with local projects with the stated goal of promoting mutual understanding.

Hun Sen said on Friday that he had ordered an investigation into whether any Americans were involved with Kem Sokha.

Opponents of Hun Sen accuse him of arresting Cambodia National Rescue Party (CNRP) leader Kem Sokha and cracking down on independent media and other critics ahead of a general election next year.

The evidence presented against Kem Sokha is a video recorded in 2013 in which he discusses a strategy to win power with the help of unspecified Americans.

According to the U.S Embassy, more than 500 Peace Corps volunteers have served and worked in Cambodia since 2006, providing English teaching and teacher training as well as community health education.

U.S. President John F. Kennedy established the Peace Corps in 1961 to promote world peace and friendship.

Hun Sen, a close ally of China, has taken a series of measures against U.S. interests this year from ending joint military exercises to expelling a naval aid unit to forcing a U.S.-funded pro-democracy group to leave.

On Thursday, Hun Sen said he was suspending cooperation with Washington to find the remains of Americans killed in the Vietnam War.

"The search cooperation is postponed until a number of issues are resolved between Cambodia and the United States," Hun Sen said according to pro-government website Fresh News.

Hun Sen said the suspension will be lifted after Cambodia-U.S. ties are restored. Washington announced on Wednesday that it would stop issuing some visas after Cambodia refused to accept Cambodian citizens deported from the United States after being convicted of crimes there.

Hun Sen said the policy of deporting them back to Cambodia "break them up as families, as parents and children, and it's an inhumane (situation) in which some have committed suicide".

The Vietnam War that ended in 1975 remains an emotive issue in Cambodia. Hun Sen says the United States has never apologised for its role in bombing his country to try to kill Vietnamese communist guerrillas and should forgive debts built up by a pro-U.S. junta that ruled until it was ousted by the genocidal Khmer Rouge.

On a separate issue, Cambodia's Foreign Affairs Ministry said it would accept deportees from the United States.