After a 6-week long absence prompted concerns over his health and whereabouts, Cameroonian President Paul Biya has returned to the country.

On his arrival from Geneva with his wife Chantal Biya, the 91 year-old did not speak to the public, but he did wave at supporters gathered nearby as his car drove away from the airport in the Cameroonian capital Yaounde.

Biya’s disappearance from Cameroon triggered widespread speculation he was ill.

But authorities have published statements insisting that he is well, and have insisted that it was a matter of national security.