Merseyside Police say two women arrested on suspicion of the manslaughter of pensioner Clifford Clarke, who was killed when he was attacked by a dog in Liverpool, have been released on bail.
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Explosives experts were called to the nuclear reprocessing site in Cumbria, to help deal with chemical substances.
The arrests were made on suspicion of producing and disseminating pedophilia content on the internet, the country's Justice Ministry said.
The A4-sized sketch originally went for £75 when it was first sold.