• Zimbabwe's US ambassador Brian Nichols was called to account for his alleged remarks over George Floyd's death
• US national security adviser Robert O'Brien referred to Zimbabwe and China as 'foreign adversaries' sowing discord
• A senior Zimbabwean official quoted by the state-owned Herald newspaper denied O'Brien's accusations

Harare – Zimbabwe summoned its US ambassador on Monday over remarks by a senior American official accusing the southern African country of stirring anti-racism protests over the death of George Floyd, the government said.

In a Sunday interview with ABC News, US national security adviser Robert O'Brien referred to Zimbabwe and China as "foreign adversaries" using social media to stoke unrest and "sow discord".

The United States has been rocked by days of sometimes violent protests after Floyd, an African-American, died while a white police officer knelt on his neck, ignoring complaints he could not breathe.

Zimbabwe's foreign ministry spokesperson James Manzou said US ambassador Brian Nichols had been called in to explain O'Brien's remarks.

"As I am speaking to you now, he is in a meeting with my minister," Manzou told AFP in the capital Harare on Monday.

'We prefer having friends and allies'

Government spokesperson Nick Mangwana said Zimbabwe did not consider itself "America's adversary".

"We prefer having friends and allies to having unhelpful adversity with any other nation including the USA," Mangwana tweeted late on Sunday.

Zimbabwe-US relations have been tense since Washington imposed sanctions against former president Robert Mugabe and members of his inner circle in 2002 over rights abuses.

Those sanctions were extended in March of this year, with Washington citing President Emmerson Mnangagwa's failure to implement reforms, as well as his violent crackdowns on opposition since he took power in 2017.

A senior Zimbabwean official quoted by the state-owned Herald newspaper denied O'Brien's accusations.

"Anyone who has seen the genesis of recent events, from the tragic death of Mr Floyd to the subsequent protests, will realise that any accusations of Zimbabwean involvement at any stage is farcical," the unnamed official said.