In a crisis, do not seek to control information flow. Instead, over-communicate. Have confidence in people's intelligence and tolerance. Confusion is a natural part of learning, and disagreement and debate are a natural part of team decision making.
You will either get through the crisis as a team, or you will end up postponing problems for later, and sewing seeds of distrust to trip you up in future.
I would rather work in an argumentative and critical but open and honest organization than in an organization that papers over disagreement and misunderstanding with dishonesty and spin.