When some of the travellers tried to escape Escaping by driving Motion away through the fields , `` The Observer '' states Statement that the police threw Body_movement truncheons , shields , fire-extinguishers and stones at them in an attempt to stop Preventing_or_letting them .

It involved Cause_to_be_included forcing people ( including off-duty members of the British security forces or people working for the security forces ) to drive Motion car bombs to British military targets after placing Placing them or their families under some kind of threat ( as human shields or hostages ) .