Statistics provided by Eurobarometer has revealed the list of most dangerous cities in Europe including Sofia in Bulgaria, Mitrovicain Kosovo, Glasgow in Scotland and so on. Hence, it is better to be vigilant if you are in one of these places.
Sofia, Bulgaria
Almost a third of Sofia's residents revealed that they have never felt safe in their own home in Sofia, Bulgaria. This is due to the fact that the high level of organized crime of robbery still remains in society. Most dangerously, a local radio host was killed in day light in 2010. A Bulgarian gangster was arrested in responsibility for the case but no one dared to give any evidence against him. To push the situation to the edge, Bulgaria's interior minister states that prosecutors have had to bow to the wishes of some 300 gangsters in the last 20 years.

Sofia, Bulgaria
Mitrovica, Kosovo

Mitrovica, which is located between Serbs and Albanians, is constantly brimming with tension between people of ethnic Albanian authorities or Kosovan rule. Fights between two groups occurred regularly despite the present of NATO peacekeeping troops
Glasgow, Scotland

Glasgow, once was known as the murder capital of Western Europe, has most violent crime in the UK. Reportedly, the city had as much violent crime as Rio de Janeiro in 2008
Marseilles, France

Marseilles, the second largest city in France, has been affected organized crime based on drug feuds and turf war. Even Argentinian soccer player Lucho Gonzalez was threaten and robbed jewelry and a Bentley
Tbilisi, Georgia

There are some parts of Georgia that you are advised to stay away including the capital, Tbilisi
Yerevan, Armenia

The country's 2008 presidential elections ended up to be the worst in the nation's post-Soviet history. Yerevan and Armenia have also reputation for domestic violence
Istanbul, Turkey

Almost 60 percent of Istanbul residents advise that you should not trust any body in the city while 39 percent of Istanbul's residents say that they never feel safe at their home in Turkey's largest city. The city always has to face with threats from al-Qaeda and Kurdish separatist
Sofia (Bulgaria) – Most Dangerous City in Europe
Related links:
Most dangerous cities around the world
Most Polluted Cities In The World 2011
Europe: Most Dangerous Cities 2011