They were only released following the intervention of the Zimbabwe Lawyers for Human Rights (ZLHR), Meso told The Standard.
"We went to Bulawayo with our gowns so that we would watch the cricket match. The place was so militarised and at 36 overs, we stood to sing the national anthem in our gowns as one of our creative protests," he said.
"At that time ZRP officers came and shoved us out and took us to Bulawayo Central Police Station."
Last month, an online petition called for New Zealand to boycott the Zimbabwe tour as a show of protest against Mugabe's regime.
Protests and strikes over unpaid wages, corruption, and the troubled African country's disastrous economy has been causing unrest in the capital of Harare.
The Black Caps scored 582/4d in their first innings of the second and last test match.
Zimbabwe are currently 55/0, with day three's play due to start at 7.30pm (NZ time).