If you realize someone is following you

Proceed to the nearest police station.

Stop a municipal police officer or any law enforcement agents

Go into a bar or another crowded place.

Ask a passer-by for help.

If you noticesomething unusual, hold your bag tightly to you.

Do not carry much money; if you have no choice, ask someone to come with you.

A dog, beside keeping you company, can be a good deterrent against crooks.

Calling the emergency numbers 112 or 113, also from a mobile phone, is free.