Preliminary data extracted from the official notification of the somalian authorities :
Tower cleared DAO-159 to climb to FL 300 AT 0840 UTC . The flight crew reported pressurization problem and requested to return to land according to the captain who didn't declare emergency. Tower cleared the aircraft for priority landing.
Tower alerted airport fire department to standby. the flight landed safely at 0853 UTC. when the aircraft exited the active runway, the flight crew requested medical assistance and tower advised the airport operator to arrange for a medical unit.
The flight could have been climbing approximately 12000 ft above MSL.
one person suspected to have been sucked out of the plane.