The group posted a picture of the child on the messaging app "Telegram" with the words: "Even the Royal Family will not be left alone."

According to Fox News, the militants also shared Prince George's school address.

The message also reportedly included words from a jihadi song which translates to "When war comes with the melody of bullets, we descend on disbelief, desiring retaliation."

This isn't the first time ISIS has used Telegram to recruit terrorists and threaten people.

Barry Spielman, whose internet surveillance company Sixgill monitors Telegram, says the threats need to be "taken seriously."

"This threat to Prince George is chilling," he told The Star. "These are very worrying times and it is critical we try to uncover these plots. Telegram is where many of them are being hatched as we speak."

ISIS allegedly used the app to recruit the terrorists responsible for Berlin's Christmas market attack.

To receive daily emails from Breaking Christian News to your inbox CLICK HERE

'This Is a Historic First': Conservative Influencer Benny Johnson Says Trump Changed Charlie Kirk's Award to Include a Cross

White House Ballroom Construction: Presidents Have Made Changes for Decades

Judge Rules against Trump Admin Effort to Purge 'Woke' Books from Military Schools

Wow! Deadly Illegal Alien Truck Driver Failed CDL Test 10 Times

Trump: Tech Leaders, Mayor Persuaded Me to Hold Off Federal Force in San Francisco

FBI Director Kash Patel: We're 'On the Verge' of Exposing Antifa's Funding Network

Inflation Eases in September, Below Analysts' Expectations; But Shutdown Needs to End

Cultural Transformation Is Happening in America among the Youth

Stunning Archaeological Discovery That Offered Powerful Biblical Proof: Inside the Dead Sea Scrolls

Biblical Tax Notice: 1st-ever Assyrian Inscription Found Near Jerusalem's Temple Mount

'A Genocide Is Happening': 35 Christian Leaders Urge Trump to Declare Nigeria a CPC

Vice President Vance Meets Hostage Families, Tours the City of David

Planned Parenthood Closes 7 California Centers Due to Federal Defunding

[Watch] Sen. John Fetterman Courageously Speaks Truth during Interview, Calling Out His Own Party; What He Said...

Another Illegal Alien, Released Under Biden, Causes Deadly Crash with a Semi

US Imposes Massive Sanctions on Russia: 'Calls on Moscow to Immediately Agree to Ceasefire'

HUGE! FBI Raids NBA Gambling Ring Tied to Italian Mafia; over 30 People Arrested, Including Trail Blazers Head Coach and Miami Heat's Player

FDA Recalls More Than 6 Million Eggs Potentially Contaminated With Salmonella

[Watch] Conor McGregor Blows the Lid Off Ireland's Immigration Nightmare

Chaos Erupts in Dublin after 10-Year-Old Girl in State Care Allegedly Raped by African Migrant