The car was cordoned off outside Citibank
Greek police have defused a car bomb outside the offices of US firm Citibank in a suburb of the capital, Athens.
No-one has claimed responsibility, but the discovery comes amid a campaign of violence by far-left militants, who have mounted several attacks on police.
Earlier, gunmen fired several rounds at cars parked outside a television station known for its investigations.
Greece has faced severe anti-government protests and rioting since police shot dead a teenager in December.
The car bomb was found on Wednesday morning outside Citibank in the northern Athens suburb of Kifissia.
Police described it as "powerful", consisting of explosives packed into gas cylinders and linked to a timer.
A security guard at the bank alerted police after seeing three people park the car next to the building and then make off. No warning had been given.
Late on Tuesday, gunmen opened fire and threw an explosive device outside the private Alter television station.
Police are investigating an attack in a TV station car park
Police said ballistics tests showed the weapons used were the same as those used in an attack against an Athens police station two weeks ago.
That was claimed by a previously unknown group calling itself the Sect of Revolutionaries.
It issued a statement vowing to target journalists and politicians, among others, and avoiding any reference to political aims, saying: "We don't do politics, we do guerrilla warfare."
Previous attacks, including the shooting of a policeman who was left seriously injured, have been claimed by another far-left group called Revolutionary Struggle.