At least three people have been killed and dozens more injured in twin suicide bomb attacks in Nigeria.
Eyewitnesses say two female militants detonated their explosives in a crowded marketplace in Yobe state.
It comes after a bomb strapped to a girl killed at least 19 people on Saturday - and amid reports that up to 2,000 people were killed by Boko Haram in a series of "massacres" over the past week.
UN secretary-general Ban Ki-moon has condemned the recent attacks.
Africa’s most populous country is due to hold elections next month even though Boko Haram extremists hold large swathes of territory in the north-east.
Mr Ban’s office said in a statement that he was appalled by reports that hundreds of civilians were slaughtered in an assault around Baga town in Borno state, near Nigeria’s border with Chad. Some reports put the death toll as high as 2,000.
Mr Ban’s office also cited reports that extremists used a 10-year-old girl as a suicide bomber to kill 19 people at a market in Maiduguri, also in Borno state, on Saturday.