REBELLIOUS forces from Ethiopia's northern region of Tigray say they have shot down a military plane and retaken a town from federal forces, a day after the prime minister announced federal troops had taken over the regional capital and military operations were complete. There was no immediate comment from the government or the military on the claims made by Debretsion Gebremichael, leader of the Tigray People's Liberation Front (TPLF) in text messages to Reuters. Claims from all sides are difficult to verify since phone and internet links to Tigray have been down and access tightly controlled since the fighting began…