A 14-year-old boy allegedly shot dead the "stepfather" of a school rival who went to his house to resolve a longstanding dispute between the teenagers.

The schoolboy, who cannot be identified, was arrested on suspicion of murder after Lee Holt, 32, died from gunshot wound to the chest.

A 49-year-old man was later arrested on suspicion of murder and is also being held in police custody.

It is understood that Mr Holt, who has a young daughter, had gone to the semi-detached property in a quiet cul-de-sac, with the 14-year-old son of his girlfriend amid allegations of bullying.

But his attempt to clear the air ended in tragedy when the other boy is said to have picked up his father’s gun.

One neighbour said he heard “raised voices” coming from the house in the Oswaldtwistle area of Accrington, Lancs, on Wednesday evening and another head a “loud gunshot” before a woman screamed "blood, blood!"

One resident attempted to resuscitate Mr Holt, who was bleeding heavily, before paramedics and police rushed to the scene at around 8.30pm.

The victim was taken to Royal Blackburn Hospital where he died a short time later, while the boy, who is understood to have two younger siblings, was taken into custody.