Israel responds: The BBC's Wyre Davies in Ashdod, Israel, says: An Israeli army spokesman said the activists refused an order not to go to Gaza with their boats laden with humanitarian aid and instead dock at the Israeli port of Ashdod. The army says its troops were attacked by the activists with axes, knives and firearms. At least four Israeli marines were injured, said a spokeswoman, including one who was shot when his gun was snatched by an activist. There's now a state of alert across Israel.