Initial operations in Central Asia In 1999 a
series of explosions in the capital
Tashkent were orchestrated in an unsuccessful attempt on Karimov's life. Karimov placed the blame on the Islamists and the IMU in particular; however this attribution remains disputed, and it is possible the assassination attempt was the work of rival political and regional elites. Irrespective of who was responsible, the result was an escalation in Karimov's suppression of Islam, particularly in the traditionally observant Fergana Valley – a move which only increased the number of those fleeing Uzbekistan to join up with Namangani and the IMU in the Tavildara Valley. The IMU established offices and training camps, and began expanding their recruitment of disaffected Uzbeks. It is estimated in 2000 that the IMU was approximately 2000 strong, and in the spring they contributed around 600 fighters to the Taliban's offensive against Massoud, participating in the successful siege of
Taloqan, where they fought alongside Bin Laden's
055 Brigade. The IMU also provided the Taliban with a useful degree of deniability, under pressure from
China to expel Uighur militants the Taliban simply sent them north to the IMU's camps. By the summer of 2000 Western and
CIS intelligence sources claim the IMU were equipped with more advanced weaponry such as
sniper rifles and
night-vision goggles, and had been supplied with a pair of heavy transport helicopters by Bin Laden. Namangani led IMU fighters back to the
Tavildara Valley in
Tajikistan, and from there launched multipronged attacks into
Batken in
Kyrgyzstan, and also into northern Uzbekistan, close to Tashkent. In response, the United States classified the IMU as a
Foreign Terrorist Organization. Once again the raids were followed by a strategic retreat to Tavildara, and once again international pressure on the Tajik government saw Namangani agree to him and his men being flown by the Russians back to Afghanistan, where they arrived in January 2001. with Namangani being killed in November 2001 by a U.S. airstrike in northern Afghanistan. In March 2002, Yuldashev and many IMU members are believed to have fought against Coalition forces during
Operation Anaconda in Afghanistan's
Shahi Kot Valley, suffering heavy casualties before retreating to the
Tribal Areas of Pakistan. Tensions grew with some locals however, with the Uzbeks accused by local Taliban leader
Maulvi Nazir of disrespecting local customs, killing tribesmen, and involving themselves in local feuds. In early 2007, fighting broke out between Nazir's fighters and the Uzbeks, which resulted in hundreds of casualties on both sides and the expulsion of the IMU from much of
South Waziristan. The alliance between the two groups continued after
Hakimullah Mehsud succeeded Baitullah as TTP leader in 2009, the IMU and the
Tehrik-i-Taliban Pakistan carried out joint attacks on the Pakistani State and eventually formed a combined unit called
Ansar al-Aseer, with the goal of freeing militant Islamist prisoners held in Pakistani prisons. Close ties were also formed with the militant
Haqqani Network following the August 2009 killing of Yuldashev in a
US drone strike, as the IMU's new leadership relocated the group to the Haqqani strongholds of
Mir Ali and
Miranshah in
North Waziristan. IMU fighters first started to become active in Afghanistan in 2007, fighting in the
Taliban insurgency against Afghan and ISAF troops. From 2010 the IMU began to expand its presence into northern Afghanistan, particularly in ethnic Uzbek areas in and around
Takhar Province. IMU commanders in northern Afghanistan integrated into the Taliban's shadow government, exercising governance in areas where the Afghan government's presence was weak. Haji Seyit Dawud, director of the Afghan media-resources center in
Kabul, claimed that the move to Afghanistan was natural as Islamic Movement of Uzbekistan was much more likely to find support in Afghanistan than in Pakistan. In Pakistan they were declared as foreign terrorist and Pakistan Army was killing them. In June 2014, the
Pakistan Armed Forces began a
major military campaign against militant groups in North Waziristan, in the wake of the IMU and TTP's
attack on Jinnah International Airport. There were media reports in the following months that many IMU fighters and their families fled these military operations and moved to Afghanistan. however it continued to cooperate closely with the Taliban in Afghanistan, according to Afghan government sources. In March 2015, a group of IMU militants in northern Afghanistan, led by Sadulla Urgenji, released a video in which they stated they no longer view the Taliban's
Mullah Omar as leader and pledged allegiance to ISIS's
Abu Bakr al-Baghdadi. This was followed by another video in July 2015, in which Sheikh Muhammad Ali, identified as the IMU's spiritual leader, swears allegiance to ISIS. In August 2015, a video was released by the group in which its leader, Usman Ghazi, leads IMU fighters in taking an oath of allegiance to ISIS and Abu Bakr al-Baghdadi. Ghazi also stated that the group should now be considered as fighters for ISIS's Afghanistan branch,
Wilayat Khorasan. In June 2016, a new faction of the IMU announced itself, denouncing ISIS and expressing its loyalty to the Taliban and al Qaeda. The group's leader now is Samatov Mamasoli aka (Abu Ali). ==Organization and leadership==