Conflict: Pro-Russia militants seize regional prosecutor's office in Donetsk

Conflict: Pro-Russia militants seize regional prosecutor's office in Donetsk; UKRAINE: Donetsk: EXT Line of riot police with shields standing guard in front of prosecutor's office Pro-Russian May Day march along (men with masked faces) Riot police pushed back as clash with pro-Russian protesters, tear gas released and noise as stun grenades thrown into crowd SOT Crowd as stun grenades thrown and tear gas rises in background (shaky camera) Riot police barricaded behind shields as rocks and stones thrown at them by hostile crowd Protesters throwing huge rocks and stones at riot police pinned against entrance to building and police being forced back into building by aggressive crowd Reporter to camera Russian loyalist supporters bombarding building with rocks Windows of building smashed with missiles thrown from crowd Man throwing petrol bomb (molotov cocktail) Building as struck with petrol bombs and other missiles GVs Riot police in courtyard sheltering beneath shields Rioters throwing missiles at building Protesters chanting 'Facists' PAN building SOT Riot police sheltering behind shields with pro-Russian supporters in foreground, one taking photograph on mobile phone Crowd surrounding group of riot police in front of building Riot police as crowd pass bullet proof vests and other protective clothing amongst themselves Protesters frog marching riot police officer, stripped of protective clothing, away Policeman lead along as balaclava ripped off by protesters Police being lead through hostile crowd INT Pro Russian supporters ransacking criminal prosecutor's office and press photographing Crowd of protesters seen through broken window EXT Protesters putting on protective clothing stolen from riot police Fire burning in front of steps of building