Trouble is brewing in the Zografou area, as heavy police forces have surrounded the student halls of residence.
The operation was launched after two consecutive calls were received by the Emergency Operations Centre, which put authorities on maximum alert.
According to initial reports, the initial call involved incidents between a group of people inside the dormitory area.
However, the situation quickly escalated as the second call reported hearing shots fired.
Eyewitnesses described scenes of tension, saying they saw one person chasing another, using a gun.
According to witnesses, officers have yet to locate any shell casingsor any traces of the incident.
