Dadullah appointed him commander of hundreds of suicide bombers and operational chief of insurgent forces inside Kabul.

[3] In early 2012, Najibullah left the Taliban due to the opening of a political office in Qatar for negotiations with the Afghan government.

He had been critical of the Taliban leadership and its negotiations with the government and Kabul amid peace-talks and a cease to the civil war in Afghanistan.

[3][6] The shura wants to lose at the table what we have won with our blood on the battlefield.He went on to established the Sacrifice Front of the Islamic Movement of Afghanistan more commonly known as Fidai Mahaz.

[citation needed] When the Taliban founder and former leader died, Najibullah revealed that due to Omar's kidney disease, he required medicine.

According to Najibullah, Mullah Akhtar Mansour poisoned the medicine that he got from Dubai, damaging Omar's liver and causing him to grow weaker.