An Iranian mother and son who converted to Christianity have been arrested in the north-western province of West Azerbaijan.

Anousheh Reza-Bakhsh (known as Veronika) and her son Soheil (known as Augustine) were arrested on 20 February at their home in Urmia, the provincial capital.

Mohabat News reports that it is the first known arrest of Christians in the city since 2008. Urmia, with nearly 700,000 inhabitants, is famous for housing the Cathedral of St. Mary the Mother of God, whose origin dates back to the 16th Century.

Middle East Concern (MEC) reports that the mother and son, who had become Catholics, were baptised in Istanbul in August last year, after which they returned home and “continued to read and learn about the Christian faith”.

Christian material was reportedly found at their home, as Augustine, reported to be a psychology student, had been “a keen follower of online Christian theological training programmes and Christian satellite TV channels”, according to MEC.

There has been no further update on their whereabouts or safety, though they are believed to have been taken to an intelligence office of Iran’s Revolutionary Guards. They are both reported to have health issues.

Iran, which is no. 8 on the 2017 Open Doors World Watch List of countries where it is most difficult to live as a Christian, continues to monitor and persecute Christians across the country. Often, detainees are subject to psychological and physical harm by the authorities.

Iranian and European human rights and religious rights organisations have urged the international community to use new opportunities for trade with Iran since the nuclear agreement to hold the government there to account over its treatment of Christian converts.