London, March 10 (IANS): Two more Islamic State (IS) brides from the UK, held with their children in Syrian detention camps, have been stripped of their British citizenship, the media reported on Sunday.

Legal sources have said that Reema Iqbal and her sister, Zara, who between them have five boys under the age of eight, have had their UK nationality removed after marrying into a terror cell linked to the murder of western hostages, reports The Sunday Times.

The development comes after the newborn baby of another IS bride Shamima Begum's died of pneumonia on Thursday at a Syrian refugee camp.

Begum, a 19-year-old British teenager of Bangladeshi descent, gave birth to her son in a Syrian refugee camp in February. She ran away to Syria in 2015. She has also been stripped of her citizenship.

According to The Sunday Times, Reema and Zara's parents are originally from Pakistan, but it is not known if they have dual nationality.

The sisters left for Syria in 2013 after marrying IS fighters with "close links" to the filmed murders of western hostages.

Zara was heavily pregnant with her second child when she travelled to Syria and later gave birth to a third.

Reema has one son born in the UK and another born in Syria.

In response to the sisters' case, the Home Office said it did not comment on individual cases, the BBC reported.

Decisions to withdraw citizenship from individuals were evidence based and not taken lightly, it added.