The head of the main opposition party in Congo has returned home after two years away for medical reasons and as tensions grow ahead of November elections.

Hundreds of supporters greeted Etienne Tshisekedi at the Kinshasa airport Wednesday. Tshisekedi did not speak after his flight from Belgium, where the 83-year-old has been living and where he led an opposition coalition meeting in June.

The opposition claims that President Joseph Kabila wants to delay the November presidential vote so he can stay in power past his mandate that expires at the end of the year.

Dozens of opposition leaders are calling for elections to take place on time and for a review of the electoral commission, which says it needs more time.

Congo has never had a peaceful transition of power.