The Islamic State's favourite poster boy – German rapper Deso Dogg – who has appeared in several Isis beheading videos, has been declared dead.

The 40-year-old Isis recruit, Denis Cuspert, aka Abu Talha al Almani, was killed in a US-led coalition air raid on 16 October, a media monitoring group, Raqqa is Being Slaughtered Silently, has reported.

The CNN, citing a US official, also confirmed that the German national was killed after his vehicle was targeted by two US coalition jets.

Deso Dogg, who joined the Isis in 2012, has appeared in several Isis propaganda videos. In 2015, he was declared a war criminal by Germany after he posed with a severed head in an Isis beheading video. 

Deso Dogg was also a convicted criminal, who was designated by the US State Department as a global terrorist. He was used by the Isis as its poster boy for recruitment purposes.

"Cuspert is emblematic of the type of foreign recruit [Isis] seeks for its ranks – individuals who have engaged in criminal activity in their home countries who then travel to Iraq and Syria to commit far worse crimes against the people of those countries," the State Department had said.