The latest unrest in the Horn of Africa nation flared on Saturday afternoon in Amhara, one of nine autonomous regions, when a "hit squad" attacked a meeting of top officials.
An emergency alert was issued for the state capital Jefferson City advising people to take shelter as heavy rain, hail, wind and lightning struck the state, along with neighboring Oklahoma and Kansas.
District chief Fazeluddin Muradi says that the insurgents' attack also wounded at least eight pro-government fighters, during several hours of battle late Friday in the area of Nahrin.
Police were called to an address in south London at 3:30am, where they found a wounded 26-year-old pregnant woman. Her baby was delivered, taken to hospital and was in a critical condition.
There was no immediate claim for the shooting and the gunman's motives were unclear but two security officials at one of the scenes of the attack told AFP that he was a militant recently released from prison.
Medics said on Monday more than 35 people were killed in what is the worst violence since the overthrow of President Omar Al Bashir in April.
A disgruntled public utility employee opened fire on co-workers at city offices in Virginia Beach, Virginia, on Friday afternoon, killing 12 people and wounding several others before he was fatally shot by police, authorities said.
The shooter was also killed after an extended gun battle with responding officers, in a scene that "best could be described as a war zone," Virginia Beach police chief James Cervera told a news conference.
The events started with the detonation of a sticky bomb — a growing menace in Kabul, where insurgents and criminals slap magnetic bombs on the underside of vehicles.