China’s official death toll from the coronavirus pandemic jumped sharply Friday as the hardest-hit city of Wuhan announced a major revision that added nearly 1,300 fatalities.

The new figures resulted from an in-depth review of deaths during a response that was chaotic in the early days. They raised the official toll in Wuhan by 50% to 3,869 deaths. While China has yet to update its national totals, the revised numbers push up China’s total to 4,632 deaths from a previously reported 3,342.