Two women were viciously attacked just minutes before a video of a man being arrested was captured and then shared on Facebook.
The footage was quickly posted on social media following the arrest, which took place in Dovecot on Monday, November 30.
A spokesman for the force has now confirmed the arrest was linked to an attack on two women who suffered head injuries shortly after 3pm.
According to Merseyside Police, officers were called to Thomas Lane, in Knotty Ash, to report that a man had punched a woman in her 60s to the head.
Another woman, in her 30s, had also been hit with a bottle and headbutted by the same man.
The attacker then left the house and threw a bottle at a car that was parked outside.
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A short time later, two police officers spotted a man on Dovecot Avenue who was acting aggressively.
As they attempted to arrest the man, witnesses recorded the incident and posted it online.
The 48-year-old was arrested on suspicion of Section 18 assault and two counts of assault of a police officers.
In a statement, a spokesperson for Merseyside Police said: "We arrested a man on suspicion of assault after attending a domestic-related incident in Knotty Ash on Monday afternoon (1 December).
"We were called to Thomas Lane, Knotty Ash at around 3.15pm to a report a woman in her 60s had been punched to the head and a woman in her 30s had been struck with a bottle and head-butted by a man at the address.
"The man was then reported to have thrown a bottle at a car outside.
"Officers attended and the victim in her 30s was located with a head injury, and taken to hospital for treatment. She has since been discharged.
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"Following enquiries in the local area, a man was located on Dovecot Avenue, Dovecot and after being seen by officers acting aggressively, was detained.
"A 48-year-old man from Knotty Ash was arrested on suspicion of Section 18 assault and two counts of assault of a police officer.
"Enquiries into the incident are ongoing."