MOSCOW, November 30 (RAPSI) – Investigators have not detected safety violations by former officials and managers of Moscow’s Domodedovo airport in connection with 2011 terrorist attack that left 37 dead, Kommersant newspaper reported Monday.

According to the newspaper, the criminal charges have been dropped against Andrei Alekseev, former federal transportation security chief, Alexander Trushanin, ex-head of the directorate for internal affairs at Domodedovo airport, his two deputies,  Andrei Danilov, Director of Domodedovo Airport Aviation Security, Vyacheslav Nekrasov, Director of airport facilities, and several other persons.

However, the case on the provision of services that allegedly do not meet security standards and which inadvertently caused the death of two or more people has been opened and is being investigated separately, the newspaper writes citing investigator Sergei Dubinsky.

On January 24, 2011, a suicide bomber detonated a bomb in the Domodedovo Airport’s international arrivals hall, killing 37 people and injuring 172. Doku Umarov, Russia’s most wanted terrorist at the time, claimed responsibility for the attack. Altogether, 28 men connected with the terrorist organization called the Caucasus Emirate were linked to the attack, according to the investigators. Seventeen of them were killed in special operations in 2011, and four were detained.

In November 2013, a Moscow region court sentenced three men to life in prison and a fourth man to 10 years for their role in the suicide bombing.

The question of Domodedovo Airport’s ownership arose back in 2011, when the investigators first stated that they couldn’t determine the owner of the airport.

The Investigative Committee initiated criminal proceedings against the airport’s former managers for failing to guarantee the safety of passengers, which resulted in the death of two or more people. The airport administration argued that this charge was inapplicable to the case in point and that they were only made responsible for airport entrance control in 2014, after the law on transport security was amended.