Updated

Police in Bulgaria have used force against demonstrators who tried to prevent them from evacuating ministers and lawmakers trapped inside Parliament. Four people were injured.

Anti-government protests in the capital, Sofia, that have been going on for 40 days escalated Tuesday evening as several hundred demonstrators trapped the officials inside Parliament in a bid to oust the left-leaning government.

A bus arrived at Parliament to escort the officials out, but protesters refused to let the vehicle leave, forming a human chain and hurling stones at it.

Demonstrators shouted "Murderers!" as dozens of police in full riot gear pushed and clubbed them to clear a path for the bus, but after an hour or so the vehicle had to return to the building.

The people hurt included some with head injuries.