A family unit is responsible for the bombing at the airport in Moscow

The investigation into the suicide bombing in the Moscow-Domodedovo airport on January 24 is moving towards a family trail, the brother and sister of the suicide bomber, suspected of complicity, including having been arrested in the volatile Russian Caucasus have media reported Wednesday.
According to Russian media, the bomber, identified as Magomed Yevloyev 20 years, was assisted by his brother Akhmed and his sister Fatima, who, according to sources, would be between 16 and 22 years.
They were remanded in custody for at least two months.
All are from the village of Ali-Yurt in Ingushetia, a small republic in the Caucasus region of Chechnya. Another suspect, Umar Aushev, inhabiting the same locality, was also arrested.
A police source told the news agency Itar-Tass that traces of explosives were found on Oumar Aushev and Akhmed Yevloyev.
"Traces of explosives were found on them. According to the expert advice, they helped to prepare Magomed Yevloyev explosive device, "said the representative of law enforcement.
The Kommersant newspaper, for his part said that another suspected suicide bomber close, Islam Yevloyev was searched and "a certain Iandiev.
The Russian authorities have not confirmed any of this information, but many sources speak anonymously in the Russian media since the attack that killed 36 people.
The investigators found that the cell that planned and committed the attack consisted of seven people.
"Currently, the identities of seven suspects, including the bomber, were determined and they are part of the group who organized and perpetrated the terrorist attack at the airport," assured a police source RIA Novosti.
"Moreover, (investigators) determined that several people had been contacted by the suspects and knew an attack was being prepared, but did not warn the police," she added.
Russian news agencies also quoted police officials who acknowledged taking seriously the claim of the attack by the rebel leader of the Islamist Russian Caucasus, Chechen, Doku Umarov.
Officially, Moscow does not comment on statements by the rebel.
"Initially, the group of Ali-Yurt is autonomous but obeyed" to Umarov, the source of Itar-Tass.
This agency and the newspaper Kommersant see a resemblance between the picture and some Magomed Yevloyev Seifoullah presented as a candidate for the "martyrdom" in a recent video of Doku Umarov promised "blood and tears" to Russia.
The information has been published by the press after a closed meeting of the Lower House of Parliament (Duma) on the progress of the investigation.
"We are dealing with a powerful ideological force and not a few isolated renegade", reportedly said on this occasion the Chief of Security Service (FSB) Alexander Bortnikov, according to information from the tabloid Tvoya Den.
Russian media reported last week that the bomber was Domodedovo Magomed Yevloyev, the son of a schoolteacher and a bus driver. This old accounting student reportedly left Ingushetia few months ago saying from a seasonal job.
After the first Chechen war (1994-1996) between Russian forces and separatists, the local rebellion gradually Islamized and increasingly overwhelmed beyond the borders Chechnya to become the mid-2000s in an armed Islamist movement active throughout the North Caucasus.