A prominent critic of Rwanda’s President Paul Kagame, Diane Rwigara, has been charged with inciting insurrection against the state, prosecutors say.
She has been charged along with her mother, Adeline Rwigara, and sister Anne Rwigara.
The provisional detention of all three had been requested, AFP news agency reported.
Diane Rwigara was barred from running in August’s presidential election.
Incumbent Paul Kagame won the election with 99% of the vote, leading to allegations of rigging which were denied by the authorities.
Diane Rwigara had also been charged with forging documents.
She has previously said she is a victim of political persecution “for standing against oppression and speaking my mind”.
Investigators allege that Ms Rwigara committed an electoral offence by collecting forged signatures to endorse her candidacy.
It is unclear what prompted the insurrection charge.
BBC