Dozens of people were killed in fighting during a foiled coup by a rogue state militia in Ethiopia's Amhara region over the weekend, the regional government spokesman said on Wednesday, the first official report of significant clashes.

The militia attacked the police headquarters, ruling party headquarters and president's office — where they executed three top officials — in Amhara's regional capital of Bahir Dar on Saturday, Asemahagh Aseres told Reuters on the sidelines of a state burial for the officials who were killed.

The militia was a recently formed unit of the region's security services. It had appealed for others to join its takeover were rebuffed, Asemahagh said.