Dushanbe says a Tajik citizen suspected of involvement in the murder of a high-ranking Russian police officer and five of his relatives traveled to Russia from Tajikistan in order "to prove his innocence."
Tajikistan's Interior Ministry said on May 5 that Mahmadali Ahmadov voluntarily presented himself to police in Dushanbe on May 4 after he learned from media reports that he was suspected in the murder.
Ahmadov said the allegations were not true, and traveled to Moscow voluntarily -- even though Tajikistan's laws protect him from being extradited to Russia.
Russia's Interior Ministry said on May 4 that Ahmadov was detained upon his arrival at Moscow's Domodedovo Airport.
On May 3, the investigators identified three Azerbaijani citizens who were arrested as suspects in the multiple-murder case.
The deputy chief of staff of the Samara region's interior department, Andrei Gosht, was found dead at his home in Syzran on April 24 along with five of his relatives.