A bloody incident on Tuesday night between Sunni and Shiite Muslims, in which knives came out and an Afghan man was wounded in the leg, has gripped to the port city of Patras.
Shiites and Sunnis are fighting against each other, adding a religious dimension to the struggle to occupy areas of Patras Port in the hope of sneaking onto a ferry heading to Italy, Proto Thema reported.
A secret report of Greek police emphasises the seriousness of the situation.
It estimates that the recent incident is not an isolated scene between groups that hate each other.
The presence of dozens of illegal immigrants from Afghanistan around the port has so far been underestimated despite police giving the impression that the situation is under control.
The same secret report underlined that most Afghans carry weapons, while it is revealed that there have been other serious incidents between Shiites and Sunnis, which have not seen the light of day.
Locals, shopkeepers and businessmen report that they live or work in a "war zone", where their sense of security is dramatically reduced.
It is estimated that the new round of another bloody confrontation between Sunnis and Shiites are not far away.
The friends of Tuesday's victims are preparing retaliation according to police.
Experienced police units claim that the situation tends to escape any supervision, which is why they emphasise that the only solution is to remove the Afghans from their accommodation around the port and to permanently guard them.