Somali state media says the security forces have thwarted an attack on a military base at the sprawling international airport complex outside the capital, Mogadishu.
It says two jihadists were killed as they tried to force their way in.
A column of smoke can be seen rising from the area which hosts international peacekeepers, the offices of UN organisations and diplomatic missions as well as hotels.
https://twitter.com/RadioDalsan1/status/1506567822247628803
No flights are reported to be taking off.
The Islamist group al-Shabab said its militants had attacked the biggest foreign military base in Somalia.
Attacks by al-Shabab have become more frequent while Somalis have been voting in much-delayed parliamentary elections.