For these Iranian Christian refugees, there seems to be no escaping persecution from Muslim extremists.

In a letter obtained by BosNewsLife, the refugees said they "fled from the Islamic Republic of Iran because we have been accused of being Christians and, therefore, have repeatedly been threatened by torture, imprisonment and the death penalty."

The refugees are now in migrant camps across Europe. Unfortunately, trouble seemed to hound them as they found themselves sharing their camps with Afghan Muslim refugees who openly despise them for converting to Christianity from Islam.

"Here, where we have been accommodated presently, we are exposed to the same kinds of threats as before, this time at the hand of Afghan Muslims, and we fear for our lives," the Christian refugees said.

"The Afghan refugees ... call us Iranian Christians 'apostates' and 'infidels' because of our decision to leave Islam and consider the shedding of our blood as legitimate (or even necessary)," they added.

Open Doors and other persecution watchdog groups earlier came up with reports on the maltreatment of Christians in refugee camps across Europe. One of the reports said at least 743 Christians have been attacked by Muslim fanatics in camps across Germany since January this year, The Christian Post reported.

"The documented cases confirm that the situation of Christian refugees in German refugee shelters is still unbearable. As a minority they are discriminated against, beaten up by and receive death threats from Muslim refugees and partly by the Muslim staff (securities, interpreters, volunteers) on grounds of their religion," the report said.

Worse, the report pointed out that the known persecution cases are only the "tip of the iceberg," saying that many other cases have not been reported.

The persecution watchdogs called on authorities at refugee camps to help protect Christians, Yazidis, and other minorities who are being targeted by their fanatical Muslim neighbours.

Archbishop of Canterbury Justin Welby and other Christian leaders earlier warned that governments need to understand the special dangers that Christian refugees face in refugee camps in Europe.