Opposition activists said hundreds were killed in a stampede allegedly provoked by security forces at the Irreecha festival in 2016.
Lilesa has been living in the U.S. since he staged a protest against his government at the Rio 2016 Olympics.
Rights groups have accused Ethiopian security forces of opening fire on protesters, killing hundreds.
Feyisa Lilesa has condemned a government crackdown on protesters in Ethiopia, which allegedly caused hundreds of deaths.
Feyisa Lilesa publicly backed anti-government protesters at the Rio 2016 Olympics.
Political change, separatist insurgencies and a possible genocide project a tough year for the continent.
Police arrested Merera Gudina for "communicating with a banned terrorist organization."
The government said 23 people died in the fire at a prison housing dissidents in September.
Ethiopia's prime minister has reshuffled his cabinet, but it's unlikely to quell widespread anger.
Vendors are too scared to sell the "Addis Standard," its editor said.
Tamiru Demisse followed Olympic counterpart Feyisa Lilesa in making anti-government gesture.
The marathon runner said he would be killed if he returned to Ethiopia after an anti-government gesture.
Lilesa protested in solidarity with Ethiopia's Oromo community after winning silver in Rio.
Almost 100 people died in recent anti-government protests, according to rights groups.
A bloody war was fought over the border between 1998 and 2000, killing tens of thousands.
Hailemariam Desalegn blamed the violent protests on "anti-peace forces."
More than 140 protesters among Ethiopia's largest ethnic group have been killed since November 2015.