Protesters are hoping to oust left-leaning government and are demanding early elections.
Police are searching for the mother of a child found with a Roma couple.
European Commission criticized forced evictions of Roma.
Officials say a turbo generator at Bulgaria's only nuclear power station has been shut down but insist there is no danger to the public.
The dramatic self-immolations have continued, despite an appeal by Bulgaria's influential Orthodox Church that such desperate actions must stop.
Probe linked Hezbollah to 2012 terror attack that killed 6.
Both suspects behind a bus attack that killed five Israeli tourists are now living in Lebanon, a top Bulgarian security official said Wednesday.
Investigators describe sophisticated bombing carried out by a terrorist cell.
Zlatomir Ivanov and one of his bodyguards were both hit as they walked up the stairs to enter the court for an appeals hearing. -Blouin World: New mob wars?