At least 20 people were killed in a bomb blast in the city of Zaria, northern Nigeria, on Tuesday, a regional governor said.

“I am sad that a terrorist bomb attack just killed 20 people in Sabon Gari Zaria,” Nasir Ahmad El-Rufai, the governor of Kaduna state, wrote on his Twitter account.

The blast happened at about 9:00 am (0800 GMT) as primary school teachers and public sector staff underwent screening at government offices in the city, according to witnesses.

There was no immediate claim of responsibility but Boko Haram Islamists will be the main suspects, as they have carried out a wave of similar attacks in the past.

Details later…

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