AN Islamic extremist who murdered a Muslim shopkeeper for “disrespecting the Prophet” has recorded a chilling YouTube video from behind bars calling on supporters to behead those he believes insult the faith.

Tanveer Ahmed, 32, is believed to have used an illicit mobile phone to record the twisted rant from inside Glasgow's Barlinnie Prison, where he is serving life for killing Asad Shah.

6 Tanveer Ahmed's rant from behind bars calling for beheadings was posted on YouTube this month Credit: YouTube

6 Peace-loving shopkeeper Asad Shah was murdered in March after expressing his Ahmadi Muslim beliefs online Credit: Spindrift

In a series of YouTube speeches he celebrates the brutal murder and urges fellow fanatics to slaughter more followers of the Ahmadi sect of Islam, yelling: "Cut off their heads, cut off their heads, cut off their heads.”

Bradford taxi driver Ahmed drove 200 miles to butcher peace-loving Mr Shah, 40, at his Glasgow newsagents in March.

Ahmed claimed his victim, an Ahmadi Muslim, had been “disrespecting the prophet Mohammed” in messages on his own YouTube account.

The killer's most recent hate-filled rant was posted on September 7, the Independent reports.

In it he celebrates sending Mr Shah “to hell with the help of Allah, the prophet, angels and saints”.

He says in Urdu: “I have the honour of sending him to the hell for ever.”

6 Twisted Tanveer Ahmed said he butchered the newsagent for 'disrespecting the Prophet Mohammed' Credit: PA:Press Association

6 Ahmed recorded hate filled rants using a mobile phone while serving life in Barlinnie prison in Glasgow Credit: News Group Newspapers Ltd

Ahmed goes on to call Ahmadi Muslims “frauds” for their beliefs - which hold the sect’s founder as a prophet following Mohammed - and accused them of “contaminating the faithful”.

He goes on to urge followers: “There’s only one punishment for insulters: cut off their heads, cut off their heads, cut off their heads.”

It was one of five messages, uploaded to the same YouTube account since May.

Prison chiefs and police have launched a probe into the messages, which could constitute a hate crime or incitement to violence.

Police Scotland said: “We have been made aware of the communications and are currently assessing the matter.”

The Scottish Prison Service said he it does not comment on individual cases but added: “We work closely with Police Scotland to detect and prevent crime. We make overt recordings of phone calls made in prison.”

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The videos have generated fresh alarm in the UK’s Ahmadi Muslim community. It comes after a Facebook page praised the murder of Mr Shah and leaflets calling for Ahmadis to convert or be killed were distributed in London.

Ahmadis face widespread persecution and violence in Pakistan - where both Ahmed and Shah's families originate - and have been declared "non-Muslims" by the government there.

Farooq Aftab, from the Ahmadiyya Muslim Community group, told The Independent: “Under no circumstances can hate speech ever be justified. We hope that the authorities clamp down all forms of extremism, hatred and hate speech."

6 Peace-loving Asad Shah was killed days after he wished a Happy Easter 'to my beloved Christian nation' Credit: PA:Press Association

6 Ahmed drove 200 miles from Bradford to murder him at his newsagents in Glasgow Credit: PA:Press Association

Mr Shah, who was granted asylum in Scotland in the 90s, was slaughtered in a frenzied knife attack days after posting a message online wishing a Happy Easter to “to my beloved Christian nation”.

Ahmed, a Sunni Muslim who identifies with the Ahle Sunnat Wal Jama'at movement, was jailed for life last month with a minimum of 27 years behind bars.

Judge Lady Rae condemned his “barbaric, premeditated and wholly unjustified killing of a much loved man who was a pillar of the local community”.

She said: “I note with considerable concern that you have expressed no remorse whatsoever for this appalling crime.”

Ahmed was unrepentant in court, releasing a statement through a lawyer accusing Mr Shah of “disrespecting the messenger of Islam, the prophet Mohammed”.

He adding: “If I had not done this others would and there would have been more killing and violence in the world.”

Yesterday he was given leave to appeal his sentence after moaning the judge reduced his minimum term by only three years for his guilty plea.