NEW : Airline CEO says situation being monitored , does n't comment on flights . Al-Shaabab is an Islamic militia that has launched a bloody battle to seize control of Somalia and oust Ethiopian forces , which are helping Somali government forces try to rout the Islamic fighters . Al-Shaabab militants threaten flights with statement , graphic on Web . Comment: Al-Shaabab group is seeking to oust Ethiopian forces from Somalia .
NEW : Airline CEO says situation being monitored , does n't comment on flights . Al-Shaabab militants threaten flights with statement , graphic on Web . Comment: Al-Shaabab group is seeking to oust Ethiopian forces from Somalia .