Cameroonian tech entrepreneur Rebecca Enonchong has been freed after three days in detention.
The reasons for her arrest in the country’s economic capital, Douala, on Tuesday are unclear.
But her detention prompted her supporters to launch the hashtag #FreeRebecca, which has been trending in the region on Twitter.
On Friday afternoon she tweeted: “I’m free!! All charges dropped!
“We can retire the #FreeRebecca hashtag. So immensely grateful to all of you for believing in me and supporting me.
Earlier in the week, her business partner had told the BBC that Ms Enonchong had been detained for contempt of court linked to legal cases involving some family property.
Last year, Ms Enonchong was listed by Forbes as one of the 50 most powerful women in Africa.
She has been critical of the government’s handling of the crisis in Cameroon’s English-speaking regions.