A 31-year-old woman is expected to be arraigned in court on Friday after she was arrested at Malta International Airport as she was trying to leave the country.
The police said the arrest on Thursday followed days of observation by Valletta police, who were looking into pickpocketing crimes.
The Bulgarian woman, they said, was involved in several other crimes in Valletta and Mosta.
Read: Police crackdown on pickpocket gangs