Iran has invited Boeing to take part in the investigation into a Ukrainian jetliner that crashed earlier this week at a time of soaring tensions between Washington and Tehran, killing all 176 people on board, state media reported Friday.

President Donald Trump issued a stark warning to Iran on Saturday, threatening to hit dozens of targets in the Islamic Republic "very fast and very hard" if it retaliates for the targeted killing of the head of Iran's elite Quds Force.

The latest on the U.S. airstrike near Baghdad that killed Iran's top general (all times local):

Global powers warned Friday that the world has become a more dangerous place and urged restraint after the U.S. assassinated Iran's top general, although Britain and Germany also suggested that Iran shared blame for provoking the targeted killing that dramatically ratcheted up tensions in the Mideast.