PHOTO: AFP
The area in the Athens suburb of Halandri was rapidly cordoned off and bomb specialists were dispatched, a police source said.
The grenade did not explode and no injuries were caused.
The attack occurred at around 0200 GMT.
The consulate was closed at the time.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ