A Minsk district court on Thursday refused to release Vladimir Neklyaev, an opposition presidential candidate, from custody.
Neklyaev and several other former candidates stand accused of organizing mass riots on December 19, 2010 in Minsk following the presidential poll.
The court previously refused to release another opposition candidate, Andrei Sannikov.
On Monday opposition candidates Vitaly Rymashevsky and Grigory Kostusev were released from custody but placed under a restraining order preventing them from leaving the city.
More than 600 protesters including eleven Russians were detained following the protests, which were sparked after Lukashenko won a landslide to secure a fourth term in office. The opposition alleged vote rigging.
Police dispersed the demonstration when the crowd tried to storm parliament following the announcement of election results.
MINSK, January 6 (RIA Novosti)