US forces attacked missile sites in southern Iran and boats trying to lay mines on Monday, US Central Command said, as top Iranian negotiators arrived in Doha for talks to end the war. “US forces conducted self-defence strikes in southern Iran today to protect our troops from threats posed by Iranian forces,” Tim Hawkins, a US Central Command spokesman, said in a statement. It gave no details of the attacks and said only that the targets included missile launch sites and boats trying to “emplace