A top ISIS spokesman has called on ‘lone wolves’ worldwide to slaughter Christians and Jews en-masse in a chilling new declaration of terror.

In a 41-minute-long recording to mark the 10-year anniversary of ISIS declaration of a caliphate in Iraq and Syria, Abu Hudhayfah al-Ansari declared Ramadan as the ‘month of jihad’ and urged extremists to launch attacks in the United States, Europe and Israel.

He went on to urge Muslims to leave their homes and migrate to join up with jihadists and strengthen their ranks.

The spokesman also heaped praise on affiliates for their operations worldwide, making particular reference to Islamic State Khorasan (ISIS-K) – the group that claimed last week’s devastating terror attack at the Crocus City Hall concert venue in Moscow which saw at least 143 civilians killed.

Al-Ansari’s deplorable message comes after he launched a campaign in January entitled ‘Kill Them Wherever You Find Them’, in which he called for renewed focus on terror attacks and reminded Muslims that the Israel-Palestine conflict is a war on Jews, not just Israel.

‘It is a religious ideological war that will continue until we kill their antichrist under the banner of the Prophet of Allah… tighten the plans and diversify operations: Blow them up with explosives, burn them with incendiary bombs, shoot them with bullets, slaughter their necks with knives, and run them over with buses,’ he said.

In the days after his announcement on January 4, ISIS affiliates claimed a flurry of fresh terror attacks, including the bombing of Kerman in Iran which killed over 100 people.

Al-Ansari’s latest horrifying call to terror comes after Russian officials increased the official death toll from the Moscow concert hall attack to 143.

Last week’s massacre in Crocus City Hall, a sprawling shopping and entertainment venue on the north-western outskirts of Moscow, was the deadliest terror attack on Russian soil in nearly 20 years.

At least four men armed with automatic rifles shot at thousands of concertgoers and set the venue on fire.

ISIS-K claimed responsibility for the heinous slaughter, releasing disturbing and graphic first-person footage of the attack, while US intelligence said it had information confirming the group was responsible.

French President Emmanuel Macron said France also has intelligence pointing to ‘an IS entity’ as responsible for the attack.

The updated fatalities from Russia’s Emergencies Ministry did not state the number of wounded, but health minister Mikhail Murashko said Thursday that 80 people were still in hospital following the shootings and another 205 had sought medical treatment.

Russia’s Federal Security Service (FSB) said it had arrested 11 people the day after the attack, including four suspected gunmen.