The message attributed to Mojtaba Khamenei was read by a presenter on Iranian state TV. He has not been seen in public since succeeding his father.

Around 90% of Iran's oil exports pass through Kharg Island, but the US president says oil infrastructure was not targeted.

Explosions are reported on two more foreign tankers in the Persian Gulf killing at least one person, port authorities say.

The reports of attacks on commercial ships came after the US said it "eliminated" 16 Iranian mine-layers in the area. Elsewhere, two drones were downed near Dubai airport.

Asynchronous programming with async and await has existed in .NET for years. Now Microsoft is delivering a new runtime environment for asynchronous execution.