Doctors Without Borders/Médecins Sans Frontières (MSF) on Sunday called the U.S. military\u0026#039;s Saturday airstrike on its charity hospital in Kunduz, Afghanistan a war crime and announced it was withdrawing all staff from the beleaguered area.MSF said 22 people, including medical workers and patients, were killed in the bombing, which occurred around 2:10 am local time and reportedly lasted for at least half an hour.\u0022Under the clear presumption that a war crime has been committed, MSF demands that a full and transparent investigation into the event be conducted by an independent international body,\u0022 said MSF general director Christopher Stokes in a statement on Sunday.The U.S. military, which initially described the hit as \u0022collateral damage,\u0022 is now claiming that Taliban fighters had been hiding in the medical center.Stokes rejected those charges, stating unequivocally, \u0022Not a single member of our staff reported any fighting inside the MSF hospital compound prior to the US airstrike on Saturday morning. The hospital was full of MSF staff, patients and their caretakers. It is 12 MSF staff members and ten patients, including three children, who were killed in the attack.\u0022\u0022We reiterate that the main hospital building, where medical personnel were caring for patients, was repeatedly and very precisely hit during each aerial raid, while the rest of the compound was left mostly untouched,\u0022 Stokes said. \u0022We condemn this attack, which constitutes a grave violation of International Humanitarian Law.\u0022The charity said all its most critical patients had been referred to other medical centers in the region, and that no MSF staff remained at the hospital in Kunduz, although some had volunteered to work at nearby clinics.President Barack Obama on Saturday said the U.S. would conduct an investigation into the bombing, but would wait until the Department of Defense completed its own probe—a response which MSF rejected as weak.\u0022Relying only on an internal investigation by a party to the conflict would be wholly insufficient,\u0022 Stokes said Sunday.Physicians for Human Rights (PHR), a medical and science advocacy organization, also referred to the targeting of a hospital as a war crime and similarly called for an independent investigation into the bombing.\u0022This is truly horrific and inexcusable,\u0022 said PHR director of international policy and partnerships Susannah Sirkin. \u0022Targeting a hospital is a war crime and warring parties are obligated to take every measure possible to avoid attacking health facilities.\u0022MSF said Saturday that it had given its coordinates to both sides involved in the fighting, including Washington and Kabul.\u0022Medical workers now have targets on their backs as they pursue their life-saving work,\u0022 said Sirkin. \u0022Extra steps must be taken to avoid harm to civilians and civilian infrastructure even if there is a legitimate target in the vicinity.\u0022Meanwhile, the crisis in the northern city continued to escalate. Saad Mukhar, the Kunduz provincial public health director, said Kunduz faced \u0022a serious, drastic shortage of medicine.\u0022\u0022I\u0026#039;m afraid that if this situation continues, we will not be able to help our patients,\u0022 Mukhar said.