A man, described as a former employee, has shot dead three people at a shipping company’s office near Athens, the BBC reports.
Greek media report that the gunman killed two men and a woman before turning the gun on himself.
The suspect was found dead next to a hunting rifle that was believed to have been used in the shooting.
Police say the gunman was a former employee who had recently been fired. The owner of the company, European Product Carriers, was among the dead.
The incident, which initially prompted a hostage situation, happened in Glyfada, about 12km south of Athens.
The armed man broke into the building, shot at employees, and then killed two men and a woman before barricading himself inside.