madrid spanish government official representative catalonia apologize friday violent response spanish police protesters attempt vote ban independence referendum region sunday see image know people hit push even one person hospitalize help regret apologize behalf officer intervene enric millo say television interview first apology madrid government official clash could see conciliatory gesture catalan leaders plan unilateral declaration independence region spain police action accord catalan health authorities around 900 injure widely condemn human right group excessive force civilian population madrid representative catalonia apologize police violence independence vote