While no one has claimed responsibility for the courthouse bombing, many linked it immediately to far-left extremist groups, whose violent attacks against government buildings, police stations and banks have increased since December 2008, when police killed a teenage boy in Athens.
Mada niko nije preuzeo odgovornost za bombaški napad na sud, mnogi su ga odmah povezali sa ekstremističkim grupama krajnje levice, čiji su nasilni napadi na vladine zgrade, policijske stanice i banke u porastu od decembra 2008, kada je policija ubila jednog tinejdžera u Atini.