The Congolese government spokesman says an opposition leader who was arrested earlier has been released.

Lambert Mende says opposition parliamentary member Martin Fayulu was detained by the military Sunday for incitement to disorder. He said, however, that as a national deputy he has immunity and can't be held.

The opposition has called for citizens to stay at home on Tuesday to demand that elections be held within the constitutional deadline.

Presidential elections are slated for November.

The opposition is worried President Joseph Kabila, who has been in power since 2001 and is meant to leave office in December, will upset the election timeline to stay in power.

Mass protests erupted last year against proposed changes to the electoral law, widely seen as a ploy to prolong Kabila's rule.