The post was shared by the Islamist terror group and revelled in a "bloody attack".

terrorists pose for selfie

The terrorists appear in a selfie before their horrific attack on Moscow (Image: Telegram/UNPIXS)

Terror group ISIS has shared a selfie of the Moscow attack gunmen praising the the "bloody attack" on a "large crowd of Christians". An offshoot of the Islamic State terror group, known as ISIS-K, claimed responsibility for the attack yesterday. The triumphant selfie shows the four alleged gunmen who massacred over 140 people in a packed concert hall on the outskirts of Moscow.

The brutal attack on the Crocus City Hall also left hundreds injured.

In the photo, the men are wearing dark baseball caps and face masks with their fingers pointing upwards - a gesture that has long-been associated with the terror group.

The pointing gesture refers to the tawhid, which is 'the belief in the oneness of God'.

The black Islamic State flag hangs on the wall in the background.

READ MORE: Russian security cut off alleged terrorist's ear and force him to eat it

ISIS

ISIS-K, an ultra-violent sect of ISIS, claimed responsibility for the attack (Image: GETTY)

The photo was circulated by ISIS' official news agency Amaq.

In a lengthy note, ISIS-K revealed the motivations behind the terrorist attack - the deadliest in Russia since the Beslan school siege 20 years ago.

ISIS-K claimed the brutal massacre was part of the "raging war between the Islamic State and countries fighting Islam".

The violent offshoot of ISIS seeks to create a caliphate across Afghanistan, Pakistan, Turkmenistan, Tajikistan, Uzbekistan and Iran, a region previously known as the Khorasan Province.

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MOSCOW

Vladimir Putin announced today that all four gunmen responsible for the shooting had been arrested (Image: GETTY)

Earlier this month, Russia’s FSB said it foiled an ISIS-K attack on a Moscow synagogue.

Vladimir Putin announced today that all four gunmen responsible for the shooting had been arrested after being caught fleeing toward Ukraine.

Russia’s interior ministry confirmed that the four suspects were all foreign citizens.

Russian state news aired footage of interrogations of three alleged attackers in Bryansk, western Russia.

Terror group ISIS has shared a selfie of the Moscow attack gunmen praising the the "bloody attack" on a "large crowd of Christians". An offshoot of the Islamic State terror group, known as ISIS-K, claimed responsibility for the attack yesterday. The triumphant selfie shows the four alleged gunmen who massacred over 140 people in a packed concert hall on the outskirts of Moscow.