Updated

A Vietnamese court has sentenced a democracy activist to three years in prison in an ongoing government crackdown on dissent.

The state-controlled Laborer newspaper said Vo Viet Dzien was convicted Tuesday in southern Tay Ninh province of carrying out "activities aimed at overthrowing the people's administration."

The 41-year-old was found guilty of working with Phuc Hung Vietnam, a relatively unknown dissident group the paper said was based in the United States.

The newspaper said Dzien was arrested in April 2012 when he entered Vietnam from Cambodia after attending two training courses organized by that group.

Vietnam's Communist government doesn't allow freedom of speech or political organization.

Last week, a court in central Vietnam sentenced 14 democracy activists to up to 13 years in prison for attempted subversion.