At least 56 people were killed and dozens more injured when two female suicide bombers blew themselves up in a refugee camp in Nigeria.
Around 78 people were being treated for injuries after the twin explosions at the camp in Dikwa, which houses some 50,000 people forced to flee from Islamist militant group Boko Haram.
Officials in Nigeria have pinned blame for the attack on the extremists.
More than 20,000 people have been killed in Nigeria since the Boko Haram insurgency began six years ago, and 2.5 million made homeless.
It comes after another two suicide bombers, believed to have come from Nigeria, killed 10 people and injured 40 in a border village with Cameroon's Far North province.
At least 65 people have been killed on the outskirts of Nigeria's Maiduguri city in a Saturday night attack by Boko Haram militants, Reuters reports.
A gas tanker has exploded at a crowded industrial plant in Nigeria, leaving more than 100 people feared dead.Read the full story ›
At least four people have been killed in an explosion at a cooking gas plant in south-eastern Nigeria, a Red Cross spokesman had said.
The blast happened as a truck was discharging butane gas at the plant in Nnewi town, Anambra state, at the same time customers were refilling their gas bottles, people nearby claimed.
Red Cross spokesman Peter Kachi said four people had been killed and four others injured.
"The gas plant was completely destroyed and several houses around the scene damaged," he said.
Troops have rescued 900 hostages being held by Boko Haram extremists, a Cameroon government spokesman has said.
Cameroonians, Chadians and Nigerians held by the Islamic extremists were freed from several camps by forces from Cameroon, Nigeria, Chad and Benin.
More than 100 extremists were killed and 100 arrested, including one of the group's leaders, during an operation in Nigeria between November 27 and 29, Issa Tchiroma Bakary said.
The operations took place in Boko Haram strongholds in the Sambisa Forest, which straddles northeastern Nigeria, Cameroon and the Lake Chad area.
More than 20,000 people have been killed during the six-year uprising by Boko Haram, which calls itself IS's "West African province".
At least 10 people were killed and dozens more injured in a suicide bomb attack by suspected members of Nigerian Islamist militant group Boko Haram, security sources have said.
The attack happened in the far north region of Cameroon, and is the latest deadly attack in the region as Boko Haram militants target the country along with Chad, Niger and Nigeria.
Cameroon has signed up to an 8,700-strong regional force with its neighbours, led by Nigeria, aiming to fight back against the militants. The United States is sending military supplies and troops to help the force, which is expected to be operational by the end of the year.
The United Nations refugee agency UNHCR warned last month that the border region near Lake Chad was being turned into a "war zone".
The Red Cross says thirty two people have been killed and 80 wounded in a blast at a market in the north east Nigerian city of Yola.
The explosion happened at a fruit and vegetable market beside a main road in the Jimeta area of Adamawa's state capital at around 8pm local time (7pm GMT).
At least 47 people have been killed and 52 injured in a blast that exploded in a northeastern Nigeria's Borno state market, a military source has told Reuters.
The sources said that the explosion struck the town of Sabon Gari at around 1.30pm. It is in a region where hundreds have been killed in attacks by suspected members of militant Islamist group Boko Haram in the last few weeks.