He added: “The unfolding political situation in Zimbabwe was of great concern.”
The United States late Tuesday encouraged its citizens in Zimbabwe to take shelter and said it was closing its embassy to the public amid unconfirmed reports that a coup against President Robert Mugabe was underway.
“As a result of the ongoing political uncertainty through the night, the ambassador has instructed all employees to remain home tomorrow,” the embassy said on its website.
“US government personnel have been instructed to shelter in their residences tonight,” it continued, adding that its citizens were advised to “shelter in place” until further notice.
There were reports late Tuesday that the military was attempting to depose the president after a day in which tanks were seen heading towards Harare and there was a noticeable increase of troops on the capital’s streets.
Tensions have been raised in Zimbabwe since last week when Mugabe fired his vice president, Emmerson Mnangagwa.
On Monday, top General Constantino Chiwenga had warned Mugabe that the army would intervene if the President continued to expel former liberation fighters who supported Mnangagwa.