Airlines that travel through East Africa are keeping an eye on an ash cloud after a volcano eruption in the Horn of Africa nation of Eritrea. Spokesman Getachew Tesfa said Ethiopian Airlines is closely watching the cloud with the help of weather experts. So far no flights have been interrupted, according to AP. Germany's Lufthansa airline is also watching. Spokesman Marco Dall'Asta says flights from Frankfurt to the capitals of Ethiopia and Eritrea may be affected by the volcano. The Volcanic Ash Advisory Center, which advises the aviation industry about volcano eruptions, said Eritrea's Dubbi volcano began erupting early Monday. -- SPA