The photo offers a rare look into jihadist governance in the Sahel, in which jihadists loyal to both al Qaeda and the Islamic State wield both direct and indirect control over many rural areas.
The attack in Mali’s northern Gao region is one of the deadliest in recent months.
JNIM took credit for last month’s suicide assault in Gao, Mali. According to the French, however, the attack was largely a failure.
The jihadist conglomerate, as suspected, claimed Sunday’s deadly siege on a military base in central Mali.
Monday’s suicide bombing in Gao was the first claimed suicide bombing of JNIM since July.
The jihadist group claims the bombing, and last week’s bombing at the G5 Sahel base in central Mali, were messages to warn France and its allies about the “costs” of being in Mali.
Only days after a suicide assault on an African military base in central Mali, another suicide car bombing hit French Barkhane troops in the northern city of Gao.
The recent battle comes less two weeks after the Tuareg militias last clashed with militants from the so-called Islamic State in the Greater Sahara.