Prague is a very safe city, but like any international metropolis sought out by tourists it also attracts crime. There is no danger to tourists, either by day or night, in any part of the city – you may see beggars or drug addicts, but they generally pose no threat.
Prague has a good security camera system capable of revealing even petty crime. However, it is advisable to be careful in the city centre. This applies especially to Královská cesta (Royal Way), the city centre from Karlovo náměstí (Karlovo Square) to Národní divadlo (National Theatre), the park by the main railway station and Florenc bus station. You should also take care of your belongings on trams and metro trains travelling through the city centre.
It’s best to keep passports, money and electronics in a closed bag and avoid crowds. Violent crime is very rare in Prague.
If you are unlucky to have something stolen, report to the nearest police station (Policie ČR - Czech National or Městská policie - City Police). For tourists in such a predicament the best place is Můstek police station where interpreters are available. In the city centre you will also find police officers on foot-patrol or on horses.
In popular tourist areas (Prague Castle, Old Town Square, Wenceslas Square) there are mobile police units in Renault Master vehicles.