MPs also backed a proposal for President Pierre Nkurunziza to become the country's "supreme leader".Read more
The head of a Burundi opposition party has been arrested after travelling to a central town for a funeral, party members have told news agency Reuters.
Aloys Baricako, president of Ranac (National Gathering for Change) was reportedly arrested on Monday night.
Party spokesman George Nikiza told Reuters: "The intelligence services in Gitega confirmed his arrest to us and said he was detained for inquiry."
A local news outlet shared this picture of Mr Baricako:
Burundi fell into turmoil in 2015 after President Pierre Nkurunziza decided to run for a third term.
Since then, more than 400,000 people have been forced from their homes.
Mr Nkurunziza was re-elected in July 2015 in a poll that was boycotted by the opposition.