Isis has called on its followers to wage “all-out war” on the West during the Muslim holy month of Ramadan, sparking fears of new attacks.

The terrorist group uses the start of the 30-day period of fasting and prayer to renew calls for atrocities every year, with previous statements linked to attacks in Orlando and France.

A statement released on YouTube said supporters who were unable to make the journey to Isis territories in Iraq and Syria should attack “infidels…in their homes, their markets, their roads and their forums…double your efforts and intensify your operations”.

Isis launched a special issue of its Rumiyah propaganda magazine calling for terror attacks during Ramadan on 26 May

The message, called “Where are the lions of war?” continued: “Do not despise the work. Your targeting of the so-called innocents and civilians is beloved by us and the most effective, so go forth and may you get a great reward or martyrdom in Ramadan.”

It listed targets including the “scholars of evil and sedition” and politicians, following lengthy articles in propaganda magazines providing instructions on lorry, car and stabbing attacks.

The segment was featured in a longer article by spokesman Abul-Hasan al-Mujahir, which was published in a Ramadan issue of Isis' Rumiyah magazine on Friday, telling readers to use the month to "maximise the benefit you receive on the day of judgement".

The magazine made no mention of the Manchester attack, despite containing details of "military operations" in Russia, the Philippines, Syria, Iraq, Egypt and Afghanistan.

It contained articles targeting Turkey, Russia, Iran and Egypt, as well as "evil scholars" who have denounced Isis' ideology.

The avalanche of propaganda came days after Isis claimed responsibility for the Manchester attack, saying it was carried out “in response to transgressions against the lands of the Muslims”.

Manchester explosion in pictures Show all 37 1 /37 Manchester explosion in pictures Manchester explosion in pictures People running down stairs as they attempt to exit the Manchester Arena after a blast, where U.S. singer Ariana Grande had been performing, in Manchester Twitter/@ZACH_BRUCE/ via REUTERS Manchester explosion in pictures Helpers attend to people inside the Manchester Arena after a suspected suicide bomber detonated an explosive device at the end of an Ariana Grande concert, killing 22 people PA wire Manchester explosion in pictures Armed officers guard outside a hotel near the Manchester Arena following reports of an explosion, in Manchester, Britain EPA Manchester explosion in pictures Police officers are seen outside the Manchester Arena, where U.S. singer Ariana Grande had been performing, in Manchester, northern England Reuters Manchester explosion in pictures MANCHESTER, ENGLAND - MAY 23: Police escort members of the public from the Manchester Arena on May 23, 2017 in Manchester, England. An explosion occurred at Manchester Arena as concert goers were leaving the venue after Ariana Grande had performed. Greater Manchester Police have confirmed 19 fatalities and at least 50 injured. (Photo by Christopher Furlong/Getty Images) Getty Images Manchester explosion in pictures MANCHESTER, ENGLAND - Emergency services arrive close to the Manchester Arena on May 23, 2017 in Manchester, England. There have been reports of explosions at Manchester Arena where Ariana Grande had performed this evening. Greater Manchester Police have have confirmed there are fatalities and warned people to stay away from the area. (Photo by Dave Thompson/Getty Images) Getty Images Manchester explosion in pictures MANCHESTER, ENGLAND - MAY 23: Police escort members of the public from the Manchester Arena on May 23, 2017 in Manchester, England. An explosion occurred at Manchester Arena as concert goers were leaving the venue after Ariana Grande had performed. Greater Manchester Police have confirmed 19 fatalities and at least 50 injured. (Photo by Christopher Furlong/Getty Images) Getty Images Manchester explosion in pictures Medics deploy at the scene of a reported explosion during a concert in Manchester, England on May 23, 2017. British police said early May 23 there were "a number of confirmed fatalities" after reports of at least one explosion during a pop concert by US singer Ariana Grande. Ambulances were seen rushing to the Manchester Arena venue and police added in a statement that people should avoid the area / AFP PHOTO / Paul ELLIS (Photo credit should read PAUL ELLIS/AFP/Getty Images) AFP/Getty Images Manchester explosion in pictures Police and fans close to the Manchester Arena, after reports of an explosion Getty Images Manchester explosion in pictures There have been reports of explosions at Manchester Arena where Ariana Grande had performed Getty Images Manchester explosion in pictures Police deploy at scene of explosion in Manchester, England, at a concert in Manchester Arena AFP/Getty Images Manchester explosion in pictures Police stand by a cordoned off street close to the Manchester Arena Getty Images Manchester explosion in pictures Police deploy at scene of explosion in Manchester, England AFP/Getty Images Manchester explosion in pictures Police deploy at scene of a reported explosion during a concert in Manchester, England, on May 23, 2017. British police said early May 23 there were "a number of confirmed fatalities" after reports of at least one explosion during a pop concert by US singer Ariana Grande. Ambulances were seen rushing to the Manchester Arena venue and police added in a statement that people should avoid the area AFP/Getty Images Manchester explosion in pictures An ambulance drives away from the Manchester Arena, where U.S. singer Ariana Grande had been performing, in Manchester Reuters Manchester explosion in pictures Police escort members of the public from the Manchester Arena in Manchester, England. Getty Images Manchester explosion in pictures A woman sits in the street in a blanket near the Manchester Arena as police guard the area following reports of an explosion, in Manchester, Britain EPA Manchester explosion in pictures Two women wrapped in thermal blankets stand near the Manchester Arena, where US singer Ariana Grande had been performing, in Manchester Reuters Manchester explosion in pictures A Royal Logistic Corps (RLC) bomb disposal robot is unloaded outside the Manchester Arena following reports of an explosion, in Manchester. At least 19 people have been confirmed dead and others 50 were injured, authorities said. It is being treated as a terrorist incident until police know otherwise EPA Manchester explosion in pictures A Royal Logistic Corps (RLC) bomb disposal robot is unloaded outside the Manchester Arena following reports of an explosion, in Manchester EPA Manchester explosion in pictures Members of the public receive treatment from emergency service staff at Victoria Railway Station close to the Manchester Arena on May 23, 2017 in Manchester, England. There have been reports of explosions at Manchester Arena where Ariana Grande had performed this evening. Greater Manchester Police have have confirmed there are fatalities and warned people to stay away from the area Getty Images Manchester explosion in pictures Armed police after a suspected terrorist attack at the Manchester Arena at the end of a concert by US star Ariana Grande left 19 dead PA wire Manchester explosion in pictures Emergency services arrive close to the Manchester Arena in Manchester Getty Images Manchester explosion in pictures An amoured police vehicle patrols near Manchester Arena in Manchester Getty Images Manchester explosion in pictures A man carries a young girl on his shoulders near Victoria station in Manchester AFP/Getty Images Manchester explosion in pictures Police officers stand at the Miller Street and Corporation Street Crossroads, in front of the Manchester Arena in Manchester, England Getty Images Manchester explosion in pictures Police block a road near to the Manchester Arena in central Manchester, England AP Manchester explosion in pictures Armed police patrol near Victoria station in Manchester, northwest England. Twenty two people have been killed and dozens injured after a suspected suicide bomber targeted fans leaving a concert of US singer Ariana Grande in Manchester Getty Images Manchester explosion in pictures Police forensic officers leave the Manchester Arena as they investigate the scene of an explosion in Manchester Getty Images Manchester explosion in pictures A forensic officer collects evidence on a walkway between Victoria station and Manchester Arena following a deadly terror attack in Manchester, Getty Images Manchester explosion in pictures A woman and a young girl wearing a t-shirt of US singer Ariana Grande talks to police near Manchester Arena following a deadly terror attack in Manchester, Getty Manchester explosion in pictures epaselect epa05982725 Susan Walton and daughter Katie, 10 (pictured), who attended the concert of Ariana Grande at the Manchester Arena, are seen in Manchester, Britain, 23 May 2017. According to a statement released by the Greater Manchester Police on 23 May 2017, police responded to reports of an explosion at Manchester Arena on 22 May 2017 evening. At least 19 people have been confirmed dead and around 50 others were injured, authorities said. The happening is currently treated as a terrorist incident until police know otherwise. According to reports quoting witnesses, a mass evacuation was prompted after explosions were heard at the end of US singer Ariana Grande's concert in the arena. EPA/NIGEL RODDIS EPA Manchester explosion in pictures Mayor of Greater Manchester Andy Burnham and Manchester City Council Leader Sir Richard Leese speak to the media outside Manchester Town Hall after a suicide bomber killed 22 people, including children, as an explosion tore through fans leaving a pop concert in Manchester Dave Higgens/PA Wire Manchester explosion in pictures The media gather behind a police cordon in Manchester Getty Images Manchester explosion in pictures Flowers left close to the Manchester Arena, the morning after a suicide bomber killed 22 people, including children, as an explosion tore through fans leaving a pop concert in Manchester Danny Lawson/PA Wire Manchester explosion in pictures Ariana Grande concert attendees Karen Moore and her daughter Molly Steed, aged 14, from Derby, leave the Park Inn where they were given refuge after last night's explosion at Manchester Arena Getty Manchester explosion in pictures Signs saying 'We love Manchester' are displayed in a window in Manchester, England Getty Images

The statement, which was riddled with apparent inaccuracies, threatened: “What comes next will be more severe on the worshippers of the cross and their allies.”

Thousands of soldiers and police are patrolling the UK as the terror threat remains at its highest level of alert, while security has been increased throughout Europe.

Ramadan has previously seen a spike in Isis terror attacks, with the US State Department warning last year that a “call to martyrdom during the month may hold a special allure to some”.

Isis’ former spokesperson, Abu Mohammed al-Adnani, issued annual calls to arms that were linked to attacks on the eve of the holy month.

His last message, delivered in May 2016 months before he was killed in a US air strike, called for a “month of calamity”.

A message reading 'ISIS Coward' is pictured alongside a teddy bear and flowers in Albert Square in Manchester, northwest England (Getty Images)

Adnani's message was linked to attacks including the massacre at an LGBT nightclub Orlando and murder of a police officer and his wife north of Paris.

Both terrorists said they were responding to Adnani’s call in statements of responsibility delivered before they were killed police.

Isis later boasted of carnage in the month, which also included that attacks at Istanbul airport and in Nice, claiming 5,200 people had been killed or injured in what it described as “military operations”.

The official count from 14 terror attacks across the US, Asia, Africa and the Middle East was more than 400 dead.

British authorities have said they are doing everything possible to guard against the risk of further attacks as the investigation into the Manchester attacks continues.

Analysts have warned that as Isis continues to suffer heavy losses in its shrinking territories in Syria and Iraq, it will turn its focus elsewhere to retain momentum.

Isis forced out of Tabqa Dam

Jeremy Corbyn was accused of “justifying” terrorism with a speech linking attacks with British foreign policy on Friday.

The Labour leader said it is the “responsibility” of governments to minimise the risk of further atrocities and recognise the West’s “war on terror” is not working.

Boris Johnson and Ben Wallace, the security minister, were among those condemning the speech, which said that “an informed understanding of the causes of terrorism is an essential part of an effective response”.

Deaths in the Middle East are one of the most effective recruitment strategies employed by Isis and other jihadi groups, feeding into a victimhood narrative painting the West as murderers and oppressors of Muslims.

But in its own propaganda, Isis has stated that an end to military operations against its territories would not stop terror attacks.

“Even if you were to stop fighting us, your best-case scenario in a state of war would be that we would suspend our attacks against you,” said an article called “Why we hate you and why we fight you”.