The mother of two brothers believed to be responsible for the Boston Marathon bombing insists her sons are innocent and were “set up,” according to a telephone interview with RT-TV, also known as Russia Today.

RT reports it had the accused Boston Marathon bombers’ mother, Zubeidat Tsarnaeva, on the telephone from Makhachkala in Russia’s Republic of Dagestan in the North Caucasus region.

“What I can say is I am really sure, I am like 100-percent sure that this is a set-up,” the woman said. “My two sons are really innocent, and I know that neither of them never, never have talked about whatever they’re saying about now, and what I want to say is … my youngest one was raised actually … from 8 years, he was raised in America, and my oldest son, he is like really, really proper raised in our house, never, nobody talked about terrorism.”

The suspects in the bombing on April 15 that reportedly killed three people and wounded 183 others are 19-year-old Dzhokhar Tsarnaev, who remains at large, and his brother, 26-year-old Tamerlan Tsarnaev, who was killed after a police car chase. Their family originates from Russia’s North Caucasus, but settled in the United States more than a decade ago.