Cambodian Prime Minister Hun Sen on Monday threatened to retaliate against the opposition if the European Union withdraws duty-free trading access over human rights concerns.

The EU in November began a formal procedure to strip Cambodia of its Everything but Arms (EBA) status, after Hun Sen returned to power in a July general election in which his party won all of the seats after a crackdown on the opposition.

"If you want the opposition dead, just cut it," Hun Sen said in a speech at the inauguration of a ring road around the capital, Phnom Penh, addressing the European Union and referring to Cambodia's EBA status.