Four burglars shot and killed an elderly man in front of his wife and son in the early hours of Monday in Orchomenos, Viotia prefecture, after the 75-year-old man woke up during the robbery.
The burglars broke into the elderly man's home at about 3:50 a.m., while the man, his wife and 47-year-old son were sleeping, but were heard by the 75-year-old.
The perpetrators shot the 75-year-old, killing him on the spot, and immoblised the son and lightly injured the elderly woman before fleeing.
The getaway car was found abandoned shortly afterwards near Atalanti, which the burglars had attempted to burn.
An investigation turned up that the car had been stolen from the greater Athens area.
A manhunt has been launched for the perpetrators.