When it comes to communication, there seven dimensions to consider if you want to communicate in a way that limits damage to the reputation of the organization. There may be limitations on what you can say for legal reasons, but the nearer you get to covering the seven dimensions, the more effective your communications will be.
Be clear about leadership. People get anxious and upset in a crisis even when they try to hide it. A clear leader, who knows how to stay calm, reassures everyone. Make sure there is a clear leader and, if it is you, focus on the task at hand, understand your goal and be prepare to make decisions under pressure. That is what it means to be a leader.