The military has taken control in Zimbabwe but said President Robert Mugabe, in power since 1980, was safe.
After seizing state TV, an army spokesman announced it was targeting people close to Mr Mugabe who had caused “social and economic suffering”.
The move came after Mr Mugabe sacked his deputy, Emmerson Mnangagwa, in favour of his wife, Grace.
Heavy gun and artillery fire could be heard in northern parts of the capital Harare early on Wednesday.
A statement read out by a general on air denied it was a coup. There was no immediate word from the president himself.
Messages appeared on a Twitter account purportedly run by the ruling Zanu-PF party saying he had been detained. But there has been no confirmation by the army.
Mr Mugabe, 93, has dominated the impoverished country’s political scene since independence from the UK.
How did the military justify its move?
Troops in armoured vehicles have been out in the streets of the capital Harare since Tuesday.
After soldiers overran the headquarters of the ZBC broadcaster, Maj Gen Sibusiso Moyo went on air to say the military wished to “assure the nation that his Excellency the president… and his family are safe and sound and their security is guaranteed”.