ROME, Italy (CNN) -- An investigation into the Italian left-wing terrorist group the Red Brigades has led to the arrest of six people who Rome police say were plotting an attack on next month's G-8 summit.
One of those arrested is Luigi Fallico, a former member of the Italian left-wing terrorist group the Red Brigades, police said Thursday.
The arrests happened after raids throughout the country as part of an investigation into the group.
Italian investigators uncovered the plot through phone interceptions, police said. The alleged terrorists had initially planned to attack the town of La Maddalena, the original location of the summit.
The suspects face charges of terrorist activities and weapon possession.
The Red Brigades carried out a wave of bloody attacks in the 1970s in Italy, including the kidnapping and murder in 1978 of former Prime Minister Aldo Moro. He was also secretary of the Christian Democrats, the biggest Italian political party at the time.
The group has not been as active in the past decade as previously, but it still wages attacks. It was responsible for the killing in 2002 of government official Marco Biagi, a champion of labor reform.
The group that claimed responsibility for his killing called itself the New Red Brigades.