Russia's top security official says the suicide bomber who killed 36 people at a major Moscow airport last week was under the influence of powerful drugs at the time of the attack.
Russia's Federal Security Service chief Alexander Bortnikov said Thursday that an autopsy of the suspected bomber showed a "huge amount of highly potent drugs and psychotropic substances."
Last week, Russian investigators identified the suspect as a a 20-year-old man from the volatile southern Caucasus region. His name was not released.
Russian President Dmitry Medvedev said Thursday that while progress had been made on the case, it still is not solved. On Wednesday, Mr. Putin told reporters the case had been almost solved.
Investigators say they have detained several people with information about the January 24 bomb attack at Domodedovo airport, and believe the bomber deliberately targeted the airport's arrivals area to affect as many foreign travelers as possible. Some 120 people were hospitalized as a result of the explosion.
President Medvedev has lashed out at the lack of effective security at the airport, and fired officials responsible for transportation safety.