(SD) – The United States has renewed its warning to civilian airlines flying over Kenya to be on the lookout for possible Al Shabaab attacks.

The US Federal Aviation Administration (FAA) said on Saturday that the Somali-based terrorist group, Al-Shabaab is capable of hitting the airplanes up to 25,000 feet, especially on popular air routes between northeastern Kenya and Somalia.

“Such weapons could target aircraft at low altitudes, including during the arrival and departure phases of flight, and/or target airports and aircraft on the ground, especially at airfields located east of 40 degrees east longitude,” read a statement in part.

The FAA’s warning includes flights between Nairobi and the Far East such as Dubai (UAE), India, and China, which use the vulnerable flight routes.

The FAA’s warning comes as Al Shabab intensified its attacks in Somalia and Kenya in recent months.