Dozens of people have been killed in explosions during Friday prayers at one of the biggest mosques in the Nigerian city of Kano, reports say.
Many more people have been hurt, with one rescue official putting casualty figures at just under 200.
The Central Mosque is where the influential Muslim leader, the Emir of Kano, usually leads prayers.
The emir recently called for people to arm themselves against Islamist militant group Boko Haram.
The group has been waging an insurgency in Nigeria since 2009 and has killed more than 2,000 people this year, rights groups say.
Some reports said there was gunfire in Kano after the explosions.
The rescue official, speaking to Agence France-Presse, put the casualty toll at 64 dead and 126 hurt, although this has not been independently confirmed.
Culled from BBC News.