Maiduguri - At least 35 people were killed on Monday when Nigerian soldiers opened fire after a bomb blast struck their convoy in the northeastern city of Maiduguri, nurses at the hospital that received the bodies said.
The nurses in the Umaru Shehu hospital said 30 of the dead were in civilian clothes, while another five wore military uniforms. Militants of Boko Haram, headquartered in Maiduguri, sometimes wear civilian clothes.
"They brought in so many dead bodies. They were more than 30 civilians, in civilian dress. We counted five dead soldiers as well," a nurse, who declined to be named, said. Most had died of gunshot wounds, she added.
Boko Haram is waging an insurgency against President Goodluck Jonathan's government with the avowed aim of reviving an ancient Islamic kingdom in majority Muslim northern Nigeria.
Borno state security spokesman Sagir Musa said he could not confirm or deny the casualty toll, but he admitted troops had opened fire after a bomb they suspected to be remotely detonated wounded two of them in a patrol.
He said the military would give a statement on Wednesday morning.
Nigerian forces launched a fresh operation against Boko Haram over the weekend, killing 30 of its members, including a senior commander, and arrested 10 others in a raid on the northeastern city of Damaturu, they said on Monday.
A crackdown on the group this year has had mixed results, weakening it but also pushing it into new areas south of its heartland. Northerners complain that heavy-handed police and military tactics, including indiscriminate killings and arrests, have made new recruits for the sect.
Lieutenant Eli Lazarus, a spokesman for joint military and police forces in northeastern Yobe state, said in a statement that they had conducted cordon and search operations at a suspected Boko Haram hideout in Damaturu on Sunday and "engaged in a gun battle with the suspected terrorists".
"About 30 suspected Boko Haram terrorists were killed in the battle which lasted several hours ... The notorious one-eyed Bakaka, the field commander of Boko Haram in Damaturu and a close associate of Abubakar Shekau, was killed," he said.
Ten others were arrested and "are presently assisting investigators to track other senior members of the terrorist group", he added. Three homemade bombs, six assault rifles, 90 rounds of ammunition and several knives were seized, he said.
There was no immediate comment from Boko Haram.
The sect's fighters have killed more than 1 000 people in bomb or gun attacks since they intensified their struggle in 2010, rights groups say. But the military are also accused of killing scores of civilians in various raids.
The crackdown appears to have left Boko Haram less capable of carrying out large-scale attacks like the one that killed 186 people in Kano in January. But they remain deadly.
Gunmen shot dead a Chinese national working for the China Geo-Engineering Corporation, at a market in Gubio, northeastern Borno state, the firm's Nigeria personnel manager Albert Audu told Reuters on Monday. But he added that police did not know if it was Boko Haram or robbers.
The United States has labeled Shekau and two other senior members 'terrorists' and put them on its sanctions list.