Congolese opposition candidate Kolelas dies of Covid-19

Republic of Congo opposition candidate Guy-Brice Parfait Kolelas has died of Covid-19 as he was being transferred to France for treatment, his campaign director told AFP, the day after presidential elections in which he was the main challenger.

Kolelas "died in the medical aircraft which came to get him from Brazzaville on Sunday afternoon," said Christian Cyr Rodrigue Mayanda on Monday.

The sixty-year-old tested positive for Covid-19 on Friday afternoon, and was unable to host his last campaign meeting in Brazzaville.

READ MORE: Congo Republic votes as President Sassou expected to extend 36-year rule

Sunday's presidential election was boycotted by the main opposition and took place under an internet blackout, with critics voicing concerns over the transparency of polls seen as tilted towards veteran leader Denis Sassou Nguesso.

Kolelas was seen as the main rival to Sassou Nguesso, who has lead the central African country for a total of 36 years since 1979.

On Saturday, he posted a video from his sickbed, declaring he was "battling against death."

"Rise up as one person... I'm fighting on my deathbed, you too fight for your change," he urged his supporters, saying the election was "about the future of your children".

Mayanda called on Kolelas' supporters to rally at 1100 am local time (1000 GMT).

"We'll continue to count the ballots. He was ahead in a number of areas," he said.

Provisional election results are not expected for days, but Sassou Nguesso is widely expected to win.

READ MORE: Thousands flee fighting in Congo after disputed polls