A new group calling itself the Cell of Rebels claimed responsibility late on Tuesday for Sunday’s bomb blast at a shopping center in the northern suburb of Kifissia.

The group posted a proclamation on the Greek branch of the independent media network Indymedia in which it said the attack, which caused extensive damage to the Gant clothing store, aimed to “create a sense of insecurity and panic among those who have cause to be concerned.”

The Cell of Rebels dedicated the attack to the three alleged members of another urban guerrilla group, the Conspiracy of the Cells of Fire, who are in custody and six other suspects being sought by authorities.

“We are at war and we are taking a position,” the group said in response to Citizens’ Protection Minister Michalis Chrysochoidis’s comment that the government is “at war” with terrorists.