Human Rights Watch has voiced criticism over the Cambodian government's latest crackdown on dissent, urging foreign donors to condemn an "escalating wave of abuse" against peaceful protesters.

The New York-based rights group said Friday that in the past week authorities have broken up a string of small protests and arrested more than a dozen people, most of whom were convicted in quick trials and sentenced to one-year prison sentences,

Brad Adams of Human Rights Watch says the crackdown "makes a mockery of promises of democratic reform."

He has urged international donors, which make up as much as half of Cambodia's central government budget, to publicly condemn the crackdown.

Prime Minister Hun Sen has run Cambodia since 1985 with little tolerance for opposition and a reputation for ruthlessness.