The Ethiopian army general accused of leading a failed coup in a restive northern region was killed Monday in a firefight with security forces amid a security crackdown in which more than 180 others have been arrested.

Brig. Gen. Asamnew Tsige was killed on the outskirts of Bahir Dar, capital of the northern Amhara region, Nigussu Tilahun, a spokesman in the prime minister’s office, told The Associated Press.

Ethiopian forces had been hunting down Asamnew since he and soldiers loyal to him attacked a meeting of the Amhara government in the regional capital Saturday, killing the regional governor and his adviser. The region’s attorney-general died of his wounds on Monday, according to local media reports.

The attack Saturday was followed hours later by the assassination in the national capital, Addis Ababa, of the chief of Ethiopia’s military and a retired army general by a bodyguard.

The killings were widely seen as an attack on Ethiopia’s reformist Prime Minister Abiy Ahmed, who has pushed through sweeping reforms since his election last year.

Asamnew, the renegade general blamed for the violence, had been pardoned by Abiy after being jailed by the previous government for allegedly plotting a coup. He had recently used social media posts to incite a rebellion in Amhara, according to reports in the Ethiopian media.

The shootout in which Asamnew was killed comes as the government roots out others suspected of supporting the rebellion. Four high-ranking officials in Amhara, including the deputy head of security there, were taken into custody Monday, according to Abere Adamu, chief of the Amhara police commission. Another 178 people have also been arrested on suspicion of taking part in violence in the region, he said.

An internet shutdown has been in force across Ethiopia since Saturday’s killings.

Flags flew at half-mast throughout Ethiopia on Monday, which was declared a day of national mourning following Saturday’s violence. Addis Ababa was peaceful as soldiers stood guard in Meskel Square and manned roadblocks throughout the capital.

The 42-year-old Abiy has initiated sweeping political and economic reforms, including the surprise acceptance of a peace agreement with neighboring Eritrea, the opening of major state-owned sectors to private investment and the release of thousands of political prisoners, including opposition figures once sentenced to death.

Although Abiy’s reforms are widely popular, some members of the previous regime are unhappy with the changes and the prime minister has survived a number of threats.

Last June, a grenade meant for Abiy killed two people and wounded many others at a big rally. Nine police officials were arrested, state media reported. In October, rebellious soldiers protesting over salaries invaded Abiy’s office, but the prime minister was able to defuse the situation.

Ethiopia is a key regional ally of the U.S. in the restive Horn of Africa region.

Tibor Nagy, U.S. assistant secretary of state for Africa, said the latest violence was a “shock, but it could have turned out so much worse.”

“Thankfully Prime Minister Abiy escaped this attempt, because there are many, many more people in Ethiopia who support his reforms than those who are opposed to them,” he told reporters Sunday in Pretoria, South Africa.

Adding that “there are vestiges of the old regime” who are opposed to Abiy, Nagy said: “I wish I could say that this is will be the last of these attempts, but no one can be certain.”

(AP)