Three Zimbabwean youth leaders were granted bail on Thursday after being charged with promoting "public violence" for taking part in a demonstration from which they were allegedly abducted by police, a lawyers rights group said.

Joanna Mamombe, Netsai Marova and Cecilia Chimbiri went missing from a Movement for Democratic Change (MDC) party protest in Zimbabwe's capital Harare on May 13.

They were found dumped on the side of the road two days later, covered in injuries and claiming they had been kidnapped by the police.

On Wednesday, Zimbabwe's national police charged the trio for taking part in an "illegal demonstration" and inciting "public violence".

"The magistrate ordered them to pay Z$1,000 ($40) bail each and report once a fortnight to the police," Zimbabwe Lawyers for Human Rights spokesman Kumbirai Mafunda told reporters outside Harare's Magistrate Court on Thursday.