British police have arrested two men on suspicion of murder after former Lostprophets singer Ian Watkins was stabbed to death at a prison in northern England, where he was serving a 35-year sentence for child sex offences.

Emergency services were called to Wakefield prison in West Yorkshire on Saturday morning after Watkins, 48, was attacked with a knife.

He was pronounced dead at the scene.

A murder investigation is underway following the arrests of two men, aged 25 and 43, West Yorkshire Police said in a statement.

Watkins was convicted in 2013 after pleading guilty to 13 charges .

He had admitted two attempted rapes, sexually assaulting a child under 13, aiding and abetting the sexual assault of a child under 13, conspiring to rape a child under 13 and conspiring to sexually as

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