'Pools of blood': Svyatoslav Khomenko, BBC News, Kiev
The demonstrators numbered barely more than a few dozen - mainly young men, most of them masked. They started the fights with police, but others supported them.
The protesters tried to pull the policemen away from their lines. They beat them and took their shields and helmets. Soon about a dozen young men were almost as well-equipped as the police.
Several times the atmosphere near the building seemed to calm down for a while, with clashes starting up again. And then the explosions began.
I saw some people - policemen and firemen - falling to the ground, and some running away from the site, limping. I saw pools of blood just near the wall of parliament.