Police patrol control a civilian near the area where police officer was seriously wounded in Athens... 
(AP)
The 9 mm weapon was used in an April 2007 attack on a suburban police station by a domestic extremist group known as Revolutionary Struggle, which also targeted the U.S. Embassy in Athens with a rocket-propelled grenade two years ago.
Using one particular weapon as a signature was one of the trademarks of Greece's deadliest terrorist group, November 17, which killed 23 people in shootings and bombings between 1975 and 2002 before a botched bombing led police to capture several members.
After the Jan. 2007 attack against the U.S. Embassy in Athens, the U.S. offered a $1 million reward, saying Revolutionary Struggle "is believed to be an offshoot" of November 17.
Greek police chief Lt. Gen. Vassilis Tsiatouras said the Kalashnikov-type rifle used Monday had also been used before — in a Dec. 23 attack on a riot police bus as it passed a university campus.
At least six serious attacks have been carried out by Greek radical groups in the past five years, including two bombings and the fatal shooting of a policeman. Most were claimed by Revolutionary Struggle.
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Associated Press writer Derek Gatopoulos in Athens contributed to this report.
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