A second man has been arrested on suspicion of the murder of nine-year-old Olivia Pratt-Korbel in Liverpool.
The 33-year-old, from Dovecot, Liverpool, was also arrested on suspicion of two counts of attempted murder.
He was arrested by armed officers in Lunsford Road, Dovecot, and is being questioned by detectives.
Nine-year-old Olivia was killed as her mother struggled with a gunman on the doorstep of their Liverpool home on Monday.
A Merseyside Police spokesperson said: ‘The investigation into Olivia’s tragic murder is ongoing and we have yet to build a strong evidentiary picture so that we can bring those responsible to justice.’
The force previously released aerial footage of the arrest of a 36-year-old man on suspicion of murder.
The man, from Huyton, was arrested in an operation involving armed officers on Thursday evening.
He was also arrested on suspicion of two counts of attempted murder.
Olivia was killed after Cheryl Korbel, 46, opened her front door on Kingsheath Avenue, Dovecot, at 10 pm BST in response to a commotion.
The intended target of the attack, Joseph Nee, 35, was being chased by an armed man.
The men – strangers to the family – burst in, and Olivia was shot.
Ms Korbel was shot in the wrist as she tried to close the door and has now been discharged from the hospital.
Her family described Olivia as a “unique, talkative, curious little girl who broke the mould when she was born”.
Nee, from Dovecot, was shot in the upper body and taken to hospital in a black Audi by a third man.
Once his treatment is complete, Nee will be called back to prison for allegedly violating the conditions of his license.
The vehicle has been seized and is being forensically examined, officers said, as they appealed to anyone who saw the black Audi Q3 in the days leading up to the shooting to get in touch.
Det Supt Mark Baker said: “Although we have arrested in connection with the horrific murder of Olivia, I want to make it completely clear that we need any information about this vehicle or the wider investigation as much as ever.
“Whatever information you have, and whether you are sure that it is the same vehicle or not, pass it on and we will assess its importance.”
Earlier, police released an image of the car, which allegedly took the intended target to the hospital.