JOS, Nigeria -- Witnesses say twin explosions have rocked the Nigerian central city of Jos and killed about 20 people.
The blasts occurred as store owners were shutting their shops and Muslims were preparing for prayers Thursday evening.
Witnesses said one blast went off at an outdoor food stand and the other at a nearby marketplace in the centre of the city. They spoke on condition of anonymity for fear of reprisals.
In May, twin car bombs in the Jos marketplace killed at least 130 people.
Those attacks were blamed on Islamic extremists from the Boko Haram group.
There was no immediate claim of responsibility for the attack but it bore all the signs of Boko Haram.
