Greek police detained four suspects in northern Greece as they probe the execution-style killing of Giannis Lalas, who had been acquitted in the high-profile murder of crime journalist Giorgos Karaivaz

Yannis Lalas, 42, previously charged and later acquitted over the killing of crime reporter Giorgos Karaivaz, was gunned down with a Kalashnikov in a central Greece hotel room. Police are investigating a possible contract killing linked to organized crime

Among the items seized were two air rifles and a substantial amount of sound equipment, raising further questions about the activities taking place at the site

Police raided five locations in Mandra near Athens and found military-grade explosives, dynamite, detonators, firearms, and bulletproof vests.

Greece’s new Organized Crime Directorate will be handling corruption, illegal trade and fraud, as part of efforts to enhance public safety.

Last week's hitman murder of a 54-year-old surveyor in Athens and more 'Mykonos Mafia' incidents prompted Greece to get tougher on crime.