Tesco is to stop sourcing products from Zimbabwe as the political crisis there escalates.
Tesco said it had taken the "difficult decision" to cut trade "until there is an end to the current political crisis".
The retailer said it could not ignore the escalating crisis and the growing consensus among the international community that further action was needed to increase pressure for change.
It said in a statement: "The amount of produce Tesco sources from Zimbabwe - worth around £1 million per year - is insignificant in terms of global trade and influence.
"However, in the current circumstances, we have decided to stop sourcing any products from Zimbabwe as long as the political crisis persists in that country.
"We also attach a very high priority to ensuring that this decision does least harm to the workers and their dependants who have supplied us from Zimbabwe.
"We cannot continue to support them through trade, but are urgently finding ways to support them by other means."
The announcement is an about-turn for Tesco, who said just last week that it would be "irresponsible" to cut support to small farmers under the current conditions.
Former Labour Cabinet minister Peter Hain, who has called on supermarkets to end their trade with Zimbabwe, said: "This is a very welcome decision by Tesco. I hope it will give a lead to other British and global companies to freeze or suspend ties with Zimbabwe under Mugabe's tyranny."
