Police are investigating reports of a shooting in Alimos, in southern Athens.
The incident occurred at a block of flats on Koumoundourou Street around 6 a.m. on Tuesday.
Police said they found a bullet casing at the scene. No injuries have been reported.
Police have cordoned off the area.
A 39-year-old man was killed in a drive-by shooting on Monday morning in the southern suburb of Vari.
Police investigators said the man, a retired boxer, was shot at least 10 times on Andreas Papandreou Street while sitting in the front passenger seat of a car.