Zimbabwe’s newly established anti-corruption commission has detained the Tourism Minister, Prisca Mupfumira.
She previously served as Labour Minister and oversaw the State pension fund.
The commission has launched an investigation into the alleged abuse of the fund as part of President Emmerson Mnangagwa’s promised drive against corruption.
It is chaired by a high court judge, Loice Matanda-Moyo.
Ms Mupfumira is the wife of the retired army general Sibusiso Moyo, who announced the 2017 military takeover which forced then President Robert Mugabe to step down.
Some critics have expressed doubts about whether the commission will be effective.
Transparency International says corruption has cost Zimbabwe more than $1bn £800m a year.
She has not commented on the allegations.