An airstrike by Sudan’s military ripped through a crowded market in the country’s western region of Darfurabracopg7, killing at least 54 people and wounding dozens more, according to local monitoring groups that called the attack a likely war crime.

The attack on Monday came as Sudan’s military continued to make sweeping gains in the capital, Khartoum, where it seized the presidential palace on Friday. The military is now trying to drive its foe, the paramilitary Rapid Support Forces, entirely out of the city.

The reported atrocity in Darfur, though, was a grim reminder of the brutal toll of Sudan’s war, the largest in Africa, as it approaches two full years. Videos and photographs from the aftermath of the strike in Toura, a small town in North Darfur,66jogo showed dozens of charred bodies and partial human remains strewed across a smoldering expanse in a town market.

The videos were geolocated to Toura by the Sudan Witness Project at the Centre for Information Resilience, a nonprofit that documents potential war crimes. Satellite images and data from NASA satellites that detect fires confirmed that an area of around 10,000 square meters was burned on Monday.

ImageSudanese army troops move through areas of Khartoum they have recently recaptured from the paramilitary Rapid Support Forces, their enemy in a brutal civil war, on Tuesday.Credit...Ivor Prickett for The New York Times

The exact toll was unclear. One Sudanese monitoring group said dozens had been killed. The American international advocacy group Avaaz, citing local groups, put it at over 200 dead. A handwritten list of fatalities provided by activists in Darfur had 54 names.

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But the dire condition of the bones, discovered in 2000 in the Chihuahuan desert in northern Mexico, concealed a secret: They belonged to a close relative of Tyrannosaurs rex. Unlike its heavily built cousin, this animal was long-legged and lightly builtabracopg7, with big eyes that may have helped it hunt in low light and a heavy snout for dispatching helpless prey.