Zimbabwe’s military has placed President Robert Mugabe under house arrest in the capital Harare, South African President Jacob Zuma says.
Mr Mugabe told Mr Zuma in a phone call that he was fine, the South African leader’s office said.
Troops are patrolling the capital, Harare, after they seized state TV and said they were targeting “criminals”.
The move may be a bid to replace Mr Mugabe with his sacked deputy, Emmerson Mnangagwa, BBC correspondents say.
Mr Mnangagwa’s dismissal last week left Mr Mugabe’s wife Grace as the president’s likely successor.
Heavy gun and artillery fire could be heard in northern parts of Harare early on Wednesday.
Mr Mugabe, 93, has dominated the impoverished country’s political scene since it gained independence from the UK in 1980.
In a statement, Mr Zuma’s office said: “President Zuma spoke to President Robert Mugabe earlier today who indicated that he was confined to his home but said that he was fine.”
Special envoys from the Southern African Development Community would be sent to Zimbabwe, he added.
A Zimbabwean army officer, Major General Sibusiso Moyo, went on TV after the takeover to say Mr Mugabe and his family were “safe and sound and their security is guaranteed”.
China, Zimbabwe’s biggest trading partner, says it is closely watching the situation and hopes that the relevant parties can properly handle their internal affairs.
The UK Foreign Office advised Britons “currently in Harare to remain safely at home or in their accommodation until the situation becomes clearer”, while the US embassy in Harare advised US citizens in Zimbabwe to “shelter in place” until further notice.
BBC