"We are not aware of where he has been taken... I was directly in contact with him until he was taken and he could no longer be online. We are very concerned."
"Those responsible for using unlawful lethal force should be promptly investigated and held accountable," Dewa Mavhinga, Southern Africa director at HRW, said in a statement.
It said protesters burned a police station, barricaded roads with large rocks, and looted shops in Harare, Kadoma and Bulawayo cities, while security forces responded with live ammunition, rubber bullets and teargas.
The protests were triggered by the government announcing at the weekend that fuel would more than double in price as the country's economic crisis deepens. (AFP) AMS