The president of Nigeria has vowed "to leave no stone unturned" in tracking down the perpetrators of a mosque attack that killed at least 81 people.

The president of Nigeria has vowed "to leave no stone unturned" in tracking down the perpetrators of a mosque attack that killed at least 81 people.

Goodluck Jonathan urged the nation "to confront the common enemy" after the gun and bomb attack during Friday's prayers in the northern city of Kano.
Hundreds of people were injured in an attack which officials say bears the hallmarks of Boko Haram militant group.

No-one has so far said that they carried out Friday's assault.
Kano's Central Mosque, where the attack took place, is where the influential Muslim leader, the emir of Kano, usually leads prayers.
He recently called for people to arm themselves against Boko Haram, so it is possible that this attack was in response to that call, says the BBC's Will Ross in Abuja.
Boko Haram, a Sunni Islamist group, has been waging an insurgency in Nigeria since 2009 and has killed more than 2,000 people this year, human rights groups say.
'Helter-skelter' President Jonathan ordered the country's security services "to launch a full-scale investigation and to leave no stone unturned until all agents of terror undermining the right of every citizen to life and dignity are tracked down and brought to justice".

He said Nigerians should "remain united to confront the common enemy".
The government, he said, would "continue to take every step to put an end to the reprehensible acts of all groups and persons involved in acts of terrorism".
Reuters news agency counted 81 bodies in two separate mortuaries following the attack on the Central Mosque.
An AFP reporter at counted 92 bodies at the Murtala Mohammed Specialist Hospital mortuary alone. Most victims were men or boys with blast injuries and severe burns.

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