A brother of slain shopkeeper Asad Shah has called his killer a "monster".

Taxi driver Tanveer Ahmed admitted his guilt at the High Court in Glasgow on Thursday. He killed Mr Shah, the court heard, because the shopkeeper had declared himself to be a new prophet on Facebook and Youtube.

One of Mr Shah's brothers, speaking anonymously in an interview for BBC's Newsnight programme, said Ahmed had hurt a harmless person who only wished people well.

He said, of Ahmed, "I wouldn't call him a man - I really don't have any message for that monster - he basically took away a person who was peaceful, who wanted unity in the world, who wanted the communities to unite - who wanted to help the community - and him harming someone of peace is literally he's an enemy of humanity."

The brother added: "It's been very difficult for the family - the family don't feel safe anymore living here in Scotland and it has split the family apart - since the incident some members of the family they've left Scotland - or are in the process of leaving and it really shouldn't have come to this."

The Shah family, Ahmadi muslims, had fled Pakistan, where their faith is persecuted, in the 1990s. Mr Shah remained a member of the community while espousing his own theories online.

His killer, Ahmed, was a Sufi from Bradford who was widely thought to be a peaceful man ahead of the attack, in March this year, on Mr Shah. Ahmed had seen Facebook posts of Mr Shah's while staying with a mutual friend in Glasgow.

"Listen to this guy, something needs to be done, it needs nipped in the bud," Ahmed said in a phone message at the time.