An Interfax correspondent has managed to talk on the phone with a man introducing himself as Anzor, the father of Tamerlan and Dzhokhar Tsarnaev, who are suspected of committing the Boston Marathon bomb attack on Monday.

"I learned about the incident from TV. My opinion is: the special services have framed my children, because they are practicing Muslims. Why did they kill Tamerlan? He was supposed to be caught alive. The younger is on the run now. He was a sophomore at a medical school in the U.S. We expected him to come home for vacation. Now I don't know what's going to happen. Tell you once again: I believe special services have framed my children," the man said.

The brothers’ uncle has confirmed to AP that the brothers lived together near Boston and have lived in the United States since immigrating there about a decade ago.

Apparently also resident in the US, Zubeidat Tsarnaeva, the mother of Dzhokhar and Tamerlan, turns out to have a criminal record of her own. On June 13, 2012, the 45-year-old was arrested by the police in Natick, Massachusetts, and charged with larceny of women's clothing valued at $1,624, as well as two counts of malicious damage to property.

The Tsarnaev family moved to Dagestan from Kyrgyzstan in 2001, the school spokesman told RT. Dzhokhar studied there for just one year and  produced no particular impression, good or bad, on the teachers.

“He arrived at our school in the first form and departed in the second,” Irina Bandurina, the secretary at Makhachkala’s School No.1, told RT. “They arrived from Kyrgyzstan and departed to the US. I’m telling you they lived here for a year. Not the whole year. They arrived at the school in 2001 and departed in March 2002 … There were four of them – two sisters and two brothers… It’s written here that they are from Kyrgyzstan. The Chechens.”

Dzhokhar was born in Kyrgyzstan. The family, which also included two daughters, Bella and Amina, had the status of refugees at the time they moved to Russia.

Vladimir Evseev, Director of the Center for Social and Political Studies, argues that terrorists’ origins don’t tell anything and terrorism is a global threat that need to be addressed.

“Terrorism has no face and those who commit terrorist acts have no nationality,” he said.“For example, some Russian passport holders have joined the Syrian rebels. These are people without a true homeland. They earn money by killing people, and cannot change their occupation. ... [Potential] terrorists may come from elsewhere."

Alexei Filatov, retired KGB officer and Vice-President of Russia’s elite Alpha Group Veterans’ Association assumes that the Tsarnaevs may be brainwashed.

“One of the suspects is 19 years old, a child. The other wanted to join the U.S. Olympic boxing team. It’s clear it would have been easy to brainwash them,” he said. “I don’t see an Islamic trail. Otherwise some organization would have taken credit for it by now. I’m not sure we’ll ever know who ordered the crime.”

“This will serve as a justification for any additional security measures the government takes, including military intervention abroad, directed at fighting radical Islam,” added Filatov.

Yet Evseev argues that the government should be more careful when it hosts foreign citizens with different backgrounds.

"Instead of sending troops to the Middle East to fight hostile regimes, America should focus on problems within its own borders,” he said.

U.S. law enforcement bodies earlier identified the Boston Marathon bombing suspects as Dzhokhar and Tamerlan Tsarnaev coming from Russia's North Caucasus.

Tamerlan Tsarnaev, 26, was killed on Thursday night in a shootout with police, while his brother was cornered and captured alive in the manhunt a day later.