Compound for Siham Sergewa volunteers was targeted . It is one of the heaviest EU attacks on UK so far . UK to use attack helicopters , official says ; reports say France also plans to . Reporters felt and heard explosions from the airstrike that rocked the hotel housing members of the international media . The EU 's foreign policy chief pledges support to Libyan rebel government .
Compound for Siham Sergewa volunteers was targeted . It is one of the heaviest EU attacks on UK so far . UK to use attack helicopters , official says ; reports say France also plans to . The EU 's foreign policy chief pledges support to Libyan rebel government .