Several worshippers were killed on Tuesday when an explosive device detonated inside a mosque at Gamboru Market in Maiduguri, the Borno State capital.
The explosion occurred during prayers, triggering panic and chaos in the usually busy market area.
Eyewitnesses said the blast tore through part of the mosque, killing some worshippers instantly and leaving others with varying degrees of injuries.
Traders and residents were seen fleeing the scene as thick smoke rose from the mosque, while some people attempted to assist the injured before emergency responders arrived.
Security operatives later cordoned off the area to prevent further casualties and enable a preliminary assessment of the incident.
As of the time of filing this report, authorities had yet to officially confirm the number of casualties.
Details later.