The attack on Las Vegas was warned by I SIS i since May of this year (Video/Photo)

Police and counterterrorism officials in Las Vegas were on high alert as the 44-minute hot video came out of the terrorist group calling on followers of this dangerous ideology to attack, the “Mail” reported, the Periscope broadcast.

While it has not been confirmed that the attack on Las Vegas which left 20 people dead and another hundred injured in the early hours of the morning, the video may have been a call for a possible jihad.

Video footage of the terrorist group presenting images of Caesar's Palace, Hotel Bellagio and other casino icons at Las Vegas's South Boulevard.

Although the images are set to be from 2015, authorities saw it as a reliable threat, especially after the massacre of the Manchester area.

Las Vegas police are increasing patrols in light of the new threat and require community vigilance.

I propaganda video SISçit published in May contains a man identified by terrorist group like Abu Hamza al-Amrik -al-Amrik, meaning American.

In the video, believed to have been made in Mosul, he is seen saying in English: “America today is carrying the cross flag and fighting against Muslims”.

He outlines air strikes against I targets SIS as savages, saying that thousands of women and children were killed by American forces.

“Are you unable to call one (unbelievers) with a knife or throw it out of a building or drive it in a car?”, he said.

“Unleash yourself from hellfire by killing a non-believers. The unbeliever and his killer will not join in hell”, he declared./Periscopi/