Man arrested on suspicion of murder in connection with killing of nine-year-old Olivia Pratt-Korbel
The force said a 34-year-old man from Liverpool was arrested on suspicion of murder and attempted murder. He remains in police custody and is being questioned by detectives.
A 41-year-old man from Knowsley has been arrested on suspicion of assisting an offender and is also in custody.
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Hide AdDetective Chief Superintendent and head of investigations Mark Kameen said: "I continue to urge anyone who has information that can help our investigation into Olivia's tragic murder to please come forward so we can bring those responsible to justice.
"A number of people have been arrested in respect of this investigation. However, we still need the public's help in ensuring that we can a build a strong evidential picture so justice is served for Olivia and her family.
"With this, I appeal for those who may have information, no matter how small, that could continue to help our inquiries to contact us directly or anonymously and we will do the rest."