Cambodia's government and its opposition are expected to face off in court and on the streets Friday as political tensions around challenges to Prime Minister Hun Sen's long-standing autocratic rule show no signs of easing.

The latest flashpoint is a case in the Phnom Penh Municipal Court against Kem Sokha, deputy leader of the Cambodia National Rescue Party, who could be sentenced to six months in prison if found guilty of ignoring a summons. He has said he won't attend the session.

The case is one of several hanging over leaders of the opposition in what is generally seen as an effort to disrupt their organizing efforts ahead of local elections next June and a 2018 general election.