On Sunday 20/09 Seven Ethiopian armed groups have formed an alliance aimed at overthrowing the government of Prime Minister Abiy Ahmed.

• BBC: Seven Ethiopian rebel groups form new alliance
• Al Jazeera: Ethiopian armed groups forge alliance against government

These forces launched and offensive against the government short after:

• Al Jazeera: Tigray forces launch offensive against Ethiopian government
• RFI: Internet disrupted in Ethiopia as conflict rages
• Ethiopia: Tigray forces seize airports as fighting spreads to Afar | Africanews