"This arrest marks the start of a sinister new chapter in the Zimbabwean government's clampdown on freedom of speech - and the new battleground is social media," Amnesty International’s Deputy Regional Director Muleya Mwananyanda said in a statement.
"Following President Mugabe’s appointment of a minister for ‘Cyber Security’ last month, the detention of Martha O’Donovan appears to confirm fears that this new portfolio will simply be used to punish anyone speaking out against the authorities on social media platforms," Mwananyanda said.
Meanwhile, the US government is not yet speaking out on the case. "We are aware of reports that a U.S. citizen was detained in Zimbabwe," a State Department official told BuzzFeed News on Friday afternoon. "We stand ready to provide appropriate consular assistance for U.S. citizens. Due to privacy considerations, we have no further comment."