Attackers suspected to be members of Somalia's al Qaeda-linked al Shabaab group have abducted two paramedics, plus a driver and a patient near Kenya's border with Somalia, police said.

The attackers ambushed an ambulance belonging to the regional county government of Mandera, north east of the country, as it transported the patient to a hospital in the county.

"The .... ambulance (was) enroute to Elwak hospital for referral with a patient ... and ... in the company of hospital staff," Mandera's Lafey police station said in a report late on Tuesday.

"They were car jacked by suspected AS (al Shabaab) militia and driven towards Somalia ... They are not in communication at now due to network issues."

While the frequency and severity of al Shabaab attacks in Kenya have reduced in recent years, the group has in the past targeted security personnel, schools, vehicles, towns and telephone infrastructure in north east and eastern Kenya as part of their campaign to pressure Kenya into withdrawing its forces from Somalia.

Kenyan troops are part of the African-Union mandated peace keeping force ATMIS that is helping defend Somalia's central government from al Shabaab.

Al Shabaab has been fighting for more than a decade to topple Somalia's central government and establish its own rule based on its strict interpretation of Islamic sharia law.

On Saturday, twin car bomb attacks that al Shabaab claimed responsibility for in the Somali capital killed at least 120 people.

In 2015, al Shabaab attackers killed 166 people at Garissa University in eastern Kenya, while in another attack at a mall in Nairobi in 2013, the group killed 67 people.

The group has been under pressure in Somalia since August when President Hassan Sheikh Mohamud began an offensive against them, supported by the United States and allied local militias, in a bid to disrupt their financial network.