Nigerian youths held memorial protests in Lagos and Abuja on Wednesday, one year after security forces violently suppressed mass protests against police brutality and bad governance.

Under heavy police watch, dozens of protesters rallied in a procession of cars waving green and white national flags from windows at the Lekki tollgate in Lagos, the site of the crackdown on last year's #EndSARS demonstrations.

Police briefly fired tear gas at the end of the protests at Lekki where they had allowed the car procession to pass through the tollgate with protesters blasting horns and chanting for justice.

At least six people were arrested at Lekki, according to an AFP correspondent at the scene.

Online messages have called on youths to 'honour the memory of the victims' Online messages have called on youths to 'honour the memory of the victims' Photo: AFP / Phill Magakoe

"EndSARS, remember them, remember them," shouted one man from inside a police van after he was detained.

"We are aware of over 20 peaceful persons... arrested at #EndSARSMemorial and detained" at the criminal police headquarters, lawyer Adetola Onayemi wrote on Twitter.

"We have at least 4 lawyers there but don't have names of these people".

Nigerian news site Legit said that one of its journalists, who had been among those detained, was released in the afternoon.

Last year's rallies began over brutality by the SARS special police unit but snowballed into protests over bad governance in the largest mass demonstrations in Nigeria's modern history.

Survivors 'speak up' a year after Nigeria's Lagos shooting Survivors 'speak up' a year after Nigeria's Lagos shooting Photo: AFPTV / Yasmine CANGA-VALLES

They came to a halt after October 20, 2020, when security forces shot at thousands of peaceful protesters gathered at the Lekki tollgate in Lagos.

Several dozen protesters also gathered in Abuja on Wednesday to mark the one-year anniversary, chanting "The people united can never be defeated".

"They were messing with the wrong generation by shooting at us," demonstrator Aichat, 27, told AFP.

"We are not going to be silenced, we are going to talk, we are going to raise our voice. You are going to hear us."

Human Rights Watch denounced what it called a 'culture of impunity' Human Rights Watch denounced what it called a 'culture of impunity' Photo: AFP / PIUS UTOMI EKPEI

At some southern cities including Port Harcourt and Nsukka, candle-lit marches are set for the evening.

The crackdown at Lekki tollgate was live-streamed on social media and Amnesty International has since said it has confirmed that at least 10 people were killed.

The Nigerian army denied shooting live rounds, telling a judicial panel only blanks were used to disperse a crowd that had violated a curfew.

IMAGES Under heavy police watch, Nigerians protested in Abuja and Lagos on year after the EndSARS demonstrations IMAGES Under heavy police watch, Nigerians protested in Abuja and Lagos on year after the EndSARS demonstrations Photo: AFPTV / John OKUNYOMIH

Information Minister Lai Mohammed on Wednesday dismissed what he called the "phantom massacre" at Lekki, criticising Amnesty and US network CNN for "shamelessly" continuing to report unproven deaths.

"One year later, and despite ample opportunities for the families of those allegedly killed and those alleging a massacre to present evidence, there has been none: No bodies, no families, no convincing evidence, nothing," he told reporters.

The protest movement is named after the social media hashtag #EndSARS, a reference to the notorious Special Anti-Robbery Squad (SARS) unit that was later disbanded.

Nigerian singer Falz, who has over eight million followers on Instagram, was among those who planned rallies in Lagos.

"It is impossible for us not to memorialise our fallen heroes," Falz wrote. "We will never ever forget."

"Innocent Nigerian citizens waved flags and sang till they were shot at, injured and killed."

Recent weeks have seen multiple warnings against more EndSARS protests by the authorities, who say they turned into rioting and pillaging last year.

According to Amnesty, at least 56 people died nationwide during the weeks of protests in 2020.

Police reported 51 civilians and 22 officers killed in and around the demonstrations, with 205 police stations and other buildings set ablaze or vandalised.

In February, several dozen protesters gathered at the Lekki tollgate to demand justice for the victims of the crackdown. All the protesters were arrested.

In a new report, Human Rights Watch (HRW) said Tuesday that victims were still awaiting justice.

It said it had interviewed 54 people, including victims and their family members, protesters, civil society members, doctors and journalists.

The rights group was unable to confirm a death toll but witnesses told researchers they saw "what appeared to be at least 15 lifeless bodies and that military officers had taken away at least 11."

Nigeria set up the judicial panel last year to investigate the bloodshed and wider allegations of police abuses.

Public hearings ended on Monday and its findings should shortly go to the government.