A group known as Concerned Nigerians on Friday took to the streets of Abuja to protest over the killings in Sudan.
Led by its convener, Deji Adeyanju, the group of protesters marched to the Sudanese Embassy as they called on the government to end the killings before it spreads to other parts of Africa.
The northeastern country has been engulfed in turmoil since security forces on June 3 violently broke up a weeks-long sit-in by protesters demanding an end to military rule.
The Central Committee for Sudanese Doctors close to the protest movement said on June 5 that at least 101 people had been killed in the crackdown.
Forty bodies were also said to have been recovered from the Nile river.
A military council has ruled the country since the ousting of President Omar al-Bashir on April 11, following months of protests against his three-decade authoritarian rule.
But army ruler General Abdel Fattah al-Burhan said following the crackdown that the agreement had been ditched and an election would take place within nine months a plan rejected by demonstrators.
Western powers have warned that snap elections will crush hopes for a democratic transition in Sudan and have called for a return to negotiations.