All News from Balkans
Nikolay Koblyakov, described as an opposition-affiliated Russian businessman, has been arrested at Sofia Airport, authorities say.
Private national channel NOVA TV reports the operation targeting Koblyakov was carried out on Tuesday evening.
Moscow had issued in 2013 a red notice for Koblyakov over an alleged criminal offense.
Meteorologists issued a code yellow warning for possible torrential rains and hailstorms for seven regions in Bulgaria.
According to the Institute for Meteorology and Hydrology, on Thursday in the regions of Vidin, Montana, Vratsa, Sofia City, Sofia Region, Pernik and Kyustendil are likely torrential rains, thunder and hailstorms.
Heavy rain struck Zagreb and the northern Medjimurje region of Croatia on Wednesday as the Western Balkan region continues to suffer more freak weather.
A brief but heavy storm ripped up trees, cut some tramlines, flooded basements and hit the Maksimir stadium, home of FC Dinamo, ripping the roof off the bench for substitutes and the protective fence.
The chief of the Sigma sub-department at the Sofia Police Directorate (SDVR) has been detained alongside four other policemen from the unit, the website Darinkews.bg quotes officials as saying.
Ivaylo Vasilev, who heads the sub-department, has been imposed detention for 24 hours over financial abuse.
The operation has been conducted by the Specialized Prosecutor's Office.
RAZGRAD - FC Partizan Belgrade played to a goalless draw against Bulgaria's PFC Ludogorets in Razgrad late Wednesday in the first, away leg of the third round of the Champions League qualifiers.
The Serbian team achieved the objective of keeping a clean sheet and come away undefeated against the Bulgarian champions.