The Twitter account shared pictures and videos of Bana and her two brothers begging the international community for help to stop the bombing of opposition-held east Aleppo.

"We are sure the army is capturing us now. We will see each other another day dear world. Bye. — Fatemah," read the last foreboding message posted on their Twitter page on Sunday.

Shortly after the post, the Twitter account disappeared.

The account may have been deleted by the family for their safety, but some suggested it could have been disabled by the Syrian army.

The Telegraph, which interviewed the mother and daughter two months ago, tried to contact Fatemah by phone but did not receive a response.