After being forced to work at gunpoint by Russian forces for over three weeks, all staff members at the Chernobyl nuclear facility in Ukraine who wanted to leave were allowed to on Monday, according to the International Atomic Energy Agency.

Ukraine’s energy regulator informed the IAEA that the rotation of the 211 staff members being held hostage at the Chernobyl plant was completed on Monday. The long-delayed complete rotation comes after 64 employees were allowed to leave the plant on Sunday for the first time since Russian forces took control of the facility on Feb. 24.