NBA legend Dikembe Mutombo was at the airport in Brussels at the time of the terrorist attack early Tuesday morning -- but wants to assure his fans ... "I am fine."
Mutombo took to Facebook and wrote, "God is good. I am in Brussels Airport with this craziness. I am fine."
He included a picture of people streaming out of the airport and added, "Thank you everyone. I am safe here. God is good."