Two women are being questioned on suspicion of manslaughter after a pensioner was killed by an "out of control dog", said Merseyside Police.
Clifford Clarke, 79, was in the garden of his home in Clubmoor, Liverpool, when the dog attacked at around 8.30pm last night, according to the police.
Two local women aged 27 and 28, arrested last night on suspicion of an offence under the Dangerous Dogs Act, 1991, were rearrested over the more serious offence today.
A force spokesman said a post-mortem examination this afternoon, revealed Mr Clarke died from "multiple injuries consistent with a dog attack."
Merseyside Police earlier said officers had found Mr Clarke laying on the ground with the out-of-control dog nearby and called in an armed unit to shoot the animal.
ITV News Correspondent Ben Chapman reports: