Chilling image posted online by ISIS shows L.A. skyscraper exploding in flames

A group affiliated to ISIS have posted a shocking image showing an explosion at the top of the third-tallest office tower in Los Angeles.

The Al-Qaeda splinter group usually focus its media activity by threatening terror attacks at New York, Washington, Las Vegas, and large European cities.

But now a new image, obtained by PJ Media, has emerged showing a camouflage-clad jihadist holding an ISIS flag with the evening L.A. skyline in the background.

A large glow of flames photo-shopped coming from the hillside beneath his feet can also be seen in the image.

An ISIS splinter group has posted a shocking image (pictured) showing an explosion at the top of the third-tallest office tower in Los Angeles

An ISIS splinter group has posted a shocking image (pictured) showing an explosion at the top of the third-tallest office tower in Los Angeles

The explosion takes place on top of the Aon Center, the 62-story tower at 707 Wilshire Boulevard in the city's financial district.

The picture also contains the caption: 'Our promise will soon be fulfilled.'

The coordinated terror attacks in Paris in November 2015 led to L.A. officials assessing threat responses.

Authorities there claimed that they need to focus more on lesser-known gathering places where a few terrorists could carry out a devastating attack. 

'Iconic and symbolic targets are not as high on terrorists' priority list as killing high numbers of people,' said Michael Downing, the LAPD's anti-terrorism deputy chief previously told the Los Angeles Times. 

PJ Media reported that the LA was included in a previous ISIS warning that 'there would be a device placed in either Heathrow, LAX or JFK airports'.

The threat coincided with another ISIS attack on a soft target: the Holey Artisan Bakery in Dhaka, Bangladesh, where 22 civilians and two police officers were killed by five terrorists. 

'Terrorists, for the most part, attack soft targets,' said terrorism expert Brian

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