Rallies are due to take place at several detention centres

But so far, they have no names to put on the wreaths as the Home Office is declining to reveal their identity.

According to some reports, the man who died at Harmondsworth in west London on 21 July was a 31-year-old Ukrainian.

The immigrant who hanged himself four days later in Dungavel, Lanarkshire, is said to have been a Vietnamese aged 23.

But one week on, the Home Office is still declining to disclose any details of the men, including their nationalities.

[The men] were in the care of the immigration services and this information is confidential," a spokesman told BBC News Online.

Faceless victims

Activists criticise the shroud of mystery that surrounds the deaths.

Margaret Woods from the Glasgow Campaign to Welcome Refugees said the decision to withhold the men's identity meant the general public would find it harder to relate to the asylum seekers' plight.

"Probably what the Home Office will say is they are trying to contact relatives [of the men], which would be fair enough: you wouldn't want to learn about it from the papers," she told BBC News Online.

"But having said that, the relatives of people who have fled from the kind of circumstances may all be dead or in hiding, and it would certainly suit the Home Office not to personalise the issue too much," she added.

"A dead refugee is a dead refugee: it's much more personal when more details come out. It certainly suits the Home Office not to give that kind of information."

Controversial deportations

Protesters say indefinite detention of people who have not been charged with any crimes is unacceptable.

According to the London-based Institute for Race Relations (IRR), asylum seekers commit suicide for fear of being sent back to their home countries where they might be persecuted.

They also blame a "lack of care in detention centres towards foreign nationals", and particularly black people.

The watchdog published a list of 10 self-inflicted deaths of asylum seekers and other foreign nationals at UK detention centres over the last four years.

This includes a woman and mother of three from Jamaica - 32-year-old Beverley Fowler, who was found hanged in 2002 in Durham prison two days before being released.

Suicides

An inquest was told the man who forced her into drug smuggling had murdered her partner, and she feared for her life.

The latest incidents started last week, when a riot erupted at Harmondsworth Detention Centre after a man was found hanged.

Detainees started fires, and it took riot police more than 24 hours to bring everything under control.

Most of the inmates were failed asylum seekers waiting to be deported against their will.

A few days later, a man was found dead at Dungavel, near Strathaven 24 miles south of Glasgow.