In a series of arrests highlighting a pattern of identity fraud, illegal employment and violence, Israeli authorities arrested four Palestinians in separate incidents for staying in Israel illegally, the police announced on Wednesday.

The first arrest came after a Jerusalem hospital reported that a man seeking treatment was using a stolen identity. Officers found the suspect, a Bethlehem resident in his 20s, in possession of a health insurance card and documents belonging to an Israeli citizen. Police said the suspect had “habitually impersonated” the individual in order to receive medical services fraudulently, noting that he had a previous conviction for the same crime.

“Upon uploading the cardholder’s details, it was revealed that he had previously filed a complaint for identity theft,” police said.