Germany's domestic intelligence agency says Iran has stepped up efforts to get missile technology from within Germany, even though sanctions ban this.
US sanctions on Iran's airlines have grounded flights carrying Shia pilgrims from Iran to holy cities in Iraq.
US President Donald Trump has rejected an Iranian offer to reopen the Strait of Hormuz, the narrow waterway Gulf oil exporters use to ship crude to world markets.
Britain's foreign secretary told Iran's government this week that the UK will not accept hostile activity against British Jews on British soil, warning about threats from Iranian-linked groups.
The United States and Iran held their first talks since a ceasefire between them broke down in June, after months of on-and-off fighting.
Five stories about China this week form one pattern.
A cargo ship was hit near Qeshm Island in the Strait of Hormuz, a narrow waterway between Iran and Oman that much of the world's oil passes through.
Leaders of the BRICS group of major developing economies met in New Delhi and agreed on artificial intelligence, trade and using currencies other than the dollar, issuing their longest joint statement in years.
Yemen's Houthi rebels say they attacked a Saudi military base on Sunday, as fighting with Yemen's government resumed, killing hundreds and forcing tens of thousands from their homes.
Leaders of the BRICS group of major emerging economies met in New Delhi and agreed to let members settle more trade using their own currencies instead of the US dollar, though no timeline was set.
After the UN nuclear watchdog referred Iran to the UN Security Council, following a vote the United States won, countries tried to restart the Council committee that enforces sanctions on Iran.
Russian President Vladimir Putin arrived in New Delhi under heavy security for a summit of the BRICS group of major emerging economies, running Saturday to Sunday.