 According to the U.S. Special Envoy to Afghanistan in 1989–1992, Peter Tomsen, Gulbuddin Hekmatyar was hired in 1990 by the Pakistani Inter-Services Intelligence (ISI) to conquer and rule Afghanistan in the benefit of Pakistani interests, which plan was delayed until 1992 as a result of US pressure to cancel it.In April 1992, according to self-made Afghan historian Nojumi, the Pakistani intelligence agency Inter-Services Intelligence (ISI) helped Hekmatyar by sending hundreds of trucks loaded with weapons and fighters to the southern part of Kabul.In June 1992, Hekmatyar with his Hezb-e Islami Gulbuddin ('Islamic party') troops started shelling Kabul.