The deportations follow a string of xenophobic attacks. The crackdown began on as South Africa moved to convene negotiations between Zimbabwe's warring political parties.
As the violence escalates, observers warn of famine and the worst humanitarian crisis on the African continent.
The technique of growing plants in a nutrient-rich solution instead of soil has potential to drastically increase agricultural output.
The US also hopes to establish a diplomatic presence in Tehran for the first time in 30 years, according to the Guardian newspaper.
Russia says that the proposed US defense shield in Poland and the Czech Republic, an initial agreement for which was inked this week, is targeting Russia, not rogue states.
Marking the anniversary of a government operation against the radical Red Mosque, the attack suggests some militants are growing bolder.
Optimistic comments from the Iranian foreign minister suggest that an accord with West may yet be reached.