The acting director of the Africa Centers for Disease Control and Prevention alleged he was "mistreated" upon his arrival at Germany's Frankfurt Airport on Saturday and had decided to return to Africa.
Ahmed Ogwell, who was on his way to attend the World Health Summit opening Sunday in Berlin, said in a tweet that his attendance at the event was in doubt after an encounter with "immigration personnel who imagine I want to stay back illegally."
"I'm happier & safer back home in Africa. They invite you then mistreat you," Ogwell wrote. "It's time to stay away from non-friendly territories for me. ... Very irritated. I'm done!"
In an update later in the day, he said, "I've decided to go back to my beautiful continent."
However, the president of the World Health Summit, Axel Fries, said Ogwell had arrived at the conference's hotel and "can therefore fully contribute" to the summit.