The Catholic Archbishop of Jos, in central Nigeria, has accused the West of ignoring the threat of the militant Islamist group, Boko Haram.

Ignatius Kaigama said the world had to show more determination to halt the group's advance in Nigeria.

He said the international community had to show the same united spirit and resolve as it had done after the recent attacks in France.

His warning came after two days of bomb attacks in which more than 20 died.

On Sunday, two female suicide attackers killed four people and injured more than 40 people in the town of Potiskum.

A day earlier another young female suicide bomber struck in the main city of north-east Nigeria, Maiduguri, killing at least 19 people.

The attacks come after reports that hundreds of people were killed last week during the capture by Boko Haram of the town of Baga in Borno state.

The archbishop said the slaughter there had shown that the Nigerian military was unable to tackle Boko Haram.