The owner of Moscow’s Domodedovo airport, the biggest in Russia, has been detained by law enforcement officers.
Dmitry Kamenshchik is facing charges linked with security measures at the airport at the time of a terrorist attack in 2011, according to a spokesman for the Investigative Committee, the state body which conducts criminal investigations.
According to the Investigative Committee, Kamenshchik was responsible for introducing a new system for checking people entering the airport. Investigators believe those changes weakened security at the airport.
The Investigative Committee brought charges against three other people -- current and former Domodedovo employees -- earlier this month.
At a briefing earlier this week, Kamenshchik, showing documents and video footage, dismissed the committee's charges against the three, telling reporters there was "no crime."
More than 30 people were killed in a suicide bombing at Domodedovo airport in January 2011 as a bomber blew himself up in the airport's arrival zone.