Nigeria’s President Goodluck Jonathan has cut short a trip to Equatorial Guinea following Wednesday’s bomb attack in the capital, Abuja, his spokesman has revealed.

Security has been tightened in the city following the blast which killed 21 people and wounded 52 others.

Mr Jonathan’s decision to return follows strong criticism that he is not doing enough to curb violence.
Militant Islamist group Boko Haram has stepped up attacks in Nigeria.

In April, it killed more than 70 people in a bomb blast at a bus stop on the outskirts of Abuja.

The group also said it was behind a car bomb attack near a bus station in the city’s Nyanya suburb in May, which killed at least 19 people and injured 60 others.