Four people were killed and 11 others were wounded on Sunday in Abal near Hudur in Bakol region when gun men opened fire on the vehicle they were traveling in.
Reports say that the injured were taken to Baidoa general hospital for treatment.
Baidoa general hospital director Abdullahi Mohamed Adan told to media that two people are in critical condition.
One of the injured confirmed that the gunmen were dressed in Somali security forces uniform, but no one knows if they were Somali troops.
Shabab militants dress the security forces uniform so to deceive the people and attack where they want.
Every critical attack in Mogadishu by Al-shabab was carried out fighters dressed with Somali security forces uniform