LONDON: A day after a man believed to be an Ahmadi shopkeeper was killed in Glasgow, police arrested a Muslim man in connection with the murder.

Asad Shah, 40, was killed on Thursday night after he had posted messages on Facebook calling for religious harmony: "Good Friday and very happy Easter, especially to my beloved Christian nation."

Police arrested a 32-year-old Muslim man on Friday, and a spokeswoman said: "A full investigation is underway to establish the full circumstances surrounding the death which is being treated as religiously prejudiced."

Vigils were held on Friday night in memory of Shah who, media reports claim, was originally from Pakistan.

In a statement on Saturday, the Ahmadiyya community in the UK condemned the "completely brutal, horrific and unjustified attack".

Scottish First Minister Nicola Sturgeon joined a vigil for Shah outside his shop on Friday night, while locals gathered again on Saturday to pay tribute to a man they said was a pillar of the community.