Attackers blow themselves up near a refugee camp and on a tricyle taxi in the north of the country, locals say.
Twin suicide bombings by suspected Boko Haram fighters have killed at least nine people in the northeastern Nigerian city of Maiduguri, officials and witnesses said.
"Two suicide bombers riding in motorised rickshaws this morning detonated their explosives 10 minutes apart, with one of them targeting the Bakassi IDP (internally displaced persons) camp on the outskirts of the city," Mohammed Kanar, spokesman for Nigeria Emergency Management Agency (NEMA), said on Saturday.
"Nine persons lost their lives with twenty-four persons injured and evacuated to various hospitals," NEMA said in a statement posted on Twitter.
Civilian self-defence fighter Dan Batta that two suicide bombers tried to enter a refugee camp, which houses more than 16,000 people fleeing fighting between the Boko Haram group and government forces, The Associated Press news agency said.
The first blast went off around 7am local time (06:00GMT), Batta said.
He said a second blast came about half an hour later and about a kilometre away when a tricycle taxi carrying at least two people exploded.
Residents saw bodies being carried into an ambulance, the Reuters news agency reported.
There was no immediate claim of responsibility but the attacks bore the hallmarks of the Boko Haram group.
Boko Haram, which seeks to create a state adhering to Islamic laws in northeastern Nigeria, has stepped up attacks in the country after a months-long lull caused by a leadership struggle in the organisation.
Boko Haram’s seven-year fight against the Nigerian government has killed about 20,000 people and displaced more than two million others.
The group pledged allegiance to the Islamic State of Iraq and the Levant (ISIL, also known as ISIS) in March 2015.