his location was detected by a Russian reconnaissance aircraft, which intercepted his phone call. On 20 March 2002, Ibn al-Khattab, who led his militia against Russian forces in Chechnya during the First and Second Chechen War, setting up many effective ambushes against Russian forces as well as managing the influx of foreign fighters and money, was killed when a Dagestani messenger hired by the Russian Federal Security Service (FSB) gave Khattab a poisoned letter. Chechen sources said that the letter was coated with "a fast-acting nerve agent, possibly sarin or a derivative". On 13 February 2004, Zelimkhan Yandarbiyev, who served as acting president of the breakaway Chechen Republic of Ichkeria between 1996 and 1997, was killed when a bomb ripped through his SUV in the Qatari capital, Doha. Yandarbiyev was seriously wounded and died in hospital. His 13-year-old son Daud was seriously injured. The day after the attack, Qatari authorities arrested three Russians in a Russian embassy villa. One of them, the first secretary of the Russian Embassy in Qatar, Aleksandr Fetisov, was released in March due to his diplomatic status and the remaining two, the GRU agents Anatoly Yablochkov (also known as Belashkov) and Vasily Pugachyov (sometimes misspelled as Bogachyov), were charged with the assassination of Yandarbiyev, an assassination attempt of his son Daud Yandarbiyev, and smuggling weapons into Qatar. There were some speculations that Fetisov had been released in exchange for Qatari wrestlers detained in Moscow. On 30 June 2004, both Russians were sentenced to life imprisonment; passing the sentence, the judge stated that they had acted on orders from the Russian leadership.Aslan Maskhadov Killed , Kommersant, 9 March 2005 But on 23 December 2004, Qatar agreed to extradite the prisoners to Russia, where they would serve out their life sentences. The agents however received a heroes' welcome on returning to Moscow in January 2005 but disappeared from public view shortly afterwards. The Russian prison authorities admitted in February 2005 that they were not in jail, but said that a sentence handed down in Qatar was "irrelevant" in Russia. On 10 July 2006 Shamil Basayev, a Chechen militant leader who was alleged to be responsible for numerous guerrilla attacks on security forces in and around Chechnya and the 2002 Moscow theater hostage crisis and described by ABC News as "one of the most-wanted terrorists in the world", was killed by an explosion near the border of North Ossetia