President Donald Trump posted on his social-media platform that while he agreed to keep negotiating with Iran, the United States had informed Tehran that the ceasefire is finished. This statement came after a series of unclaimed airstrikes hit Iran, following the US announcement that it had completed its own attacks. The conflict has rattled oil markets, with Brent crude rising above $75 a barrel this week on fears that continued fighting could disrupt tanker traffic through the Strait of Hormuz, a critical route for Persian Gulf oil shipments. US stock indexes were mostly flat Friday as traders awaited further developments.