At one point,a security guard can be seen putting his knee on the back of his head,forcing his face into the floor.

Mothers with babies in prams watch on as he screams out but his head is pinned to the ground in the busy shopping area.

The guards shout ‘stay down’.

After more than three minutes,he appears unresponsive and the security guards let go. One of the guards puts Mr Sakila’s hood up and appears shaky as he makes a phone call.

Dozens of people gathered at noon on Tuesday,laying flowers and red roses along the busy shopping street.

Yves Sakila died in hospital on Friday (Picture: Social media)

Chants of ‘Justice for Yves’ and ‘no more violence’ were heard,while some held signs reading ‘Black lives matter here too’.

Gardaí said the man had been detained in connection with alleged shoplifting shortly after 5pm,before becoming unresponsive. He later died in hospital.

The Garda Ombudsman (Fiosrú) is now examining the incident after it was referred by officers.

Arnotts said it was ‘deeply saddened’ by Mr Sakila’s death and confirmed it is co-operating with the investigation,as well as carrying out a review with its contracted security firm.

Ireland’s Taoiseach Micheál Martin offered his sympathies,saying the case must be ‘thoroughly investigated’.

‘I don’t want to prejudice the outcome,’ he said,‘but people are clearly very concerned about what has transpired.’

At the vigil,members of the public spoke of their shock.

Chris Kibiadi said: ‘It’s not all about the colour. This could happen to anybody.’

A woman named Lolo described the death as ‘painful’,adding that gardaí should have been called.

John Kabongo told the crowd his children were left frightened after seeing the footage.

‘They asked me,“Is this really happening in Ireland?” I didn’t know how to explain it,’ he said.

Community representatives also called for answers,with Walter Kabangu of the Congolese Chamber of Commerce Ireland saying he was ‘shocked and saddened’.

‘As a community,we demand justice,’ he said.

The Irish Network Against Racism (INAR) said it was ‘extremely disturbed’ and urged a full investigation to maintain trust in the justice system.

Arnotts added: ‘No loss of life should ever be the outcome of a retail security incident.’

The investigation is ongoing.