More than 100 people were killed in bomb attacks and gunfights in Nigeria's second largest city Kano late on Friday, a senior local government security source told Reuters, in the deadliest coordinated strike claimed by Islamist sect Boko Haram to date.

Definitely more than 100 have been killed, the source, who could not be named, said. There were bombs and then gunmen were attacking police and police came back with attacks. Hospital staff said there were still bodies arriving at morgues in Kano.

Boko Haram has claimed responsibility for the attack. The sect has killed hundreds in the north of Africa's most populous nation in the last year.

(Reporting by Mike Oboh; Writing by Joe Brock; Editing by Janet Lawrence)