The newborn son of British “ISIS bride” Shamima Begum has died in Syria, according to new reports.

The 19-year-old’s two-week-old baby, Jarrah, had a lung infection and died Thursday, US-backed rebel group the Syrian Democratic Forces told the BBC.

Begum, who fled London to join the terror group in 2015, has been trying to return to the UK but was recently stripped of her citizenship.

The baby, however, retained his citizenship and could have been allowed into the UK.

“I have nothing but sympathy for the children that have been dragged into this. This is a reminder of why it is so, so dangerous for anyone to be in this war zone,” the UK’s Home Secretary Sajid Javid told the BBC upon news of the boy’s death.

Begum had already lost two other children, and named Jarrah after her first-born son at the request of her terrorist husband Yago Riedijk, who she married in 2015.

Begum had said she wanted to return home for the sake of her son.

“I’m not the same silly little 15-year-old schoolgirl who ran away from Bethnal Green four years ago. And I don’t regret coming here,” she previously told the UK Times.

Begum was staying in the same refugee camp as American-born “ISIS bride” Hoda Muthana — although the Alabaman’s lawyer said recently she’d moved to a new camp due to “threats from ISIS extremists.”

Muthana, who has an infant son, has been begging to be allowed back into the US, but the Trump administration insists she was never a citizen.