Russia continues to assist the United States in search for the world's most wanted terrorist and the head of the al-Qaeda terrorist organization, Osama bin Laden, a senior Russian counterterrorism official said.
Washington holds bin Laden responsible for masterminding the September 11 terrorist acts in the United States, which claimed some 3,000 lives, RIA Novosti reported.
"I know for certain that we have provided and continue to provide concrete assistance [to the United States] in this issue," Anatoly Safronov, Special Representative of the Russian President for International Cooperation in the Fight against Terrorism and Transnational Organized Crime, said on Thursday in Washington.
The Russian official did not disclose the details of the ongoing operation.
Osama bin Laden and his organization have been major targets of the United States' War on Terror for a decade.
The elusive terrorist leader disappeared after Afghanistan's Taliban regime, which had granted him asylum, collapsed under U.S. air strikes in late 2001. Since then, bin Laden's location has been unknown.
Some analysts believe bin Laden could be in hiding in the mountainous regions on the border between Afghanistan and Pakistan. However, both countries have repeatedly dismissed the allegations.