A teenage girl was injured after shots were fired at a Toxteth bus stop.
Emergency services were contacted at 5.10pm on Tuesday following reports that a teenage girl had been shots had been fired in Upper Warwick Street.
The 15-year-old girl was taken to hospital where her condition is currently stable.
A short time later a man in his 20s turned up at hospital with a gunshot injury to his hand which is not believed to be life threatening.
Detectives have since arrested a 21-year-old from the local area on suspicion of attempted murder and possession of a firearm with intent to endanger life.
House-to-house inquiries have been carried out and Crime Scene Investigations have carried out forensic examinations at the scene. Officers will also be checking CCTV in a bid to establish the circumstances of the incident.
High visibility patrols have also been stepped up in the area to reassure the local community.
Chief Inspector Col Rooney said: “The investigation is in the very early stages as we seek to establish what has taken place and who was involved.
“While I understand this is a shocking incident for the local community we have a large police presence in the area carrying out a number of lines of enquiry and I would encourage people to come forward and tell us what they know.
“I would ask anyone who was in the area of Upper Warwick Street around 5.10pm this evening who saw or heard anything suspicious or thinks they have captured anything significant on their mobile phone, dashcam or Ring doorbell to contact us as a matter of urgency.
“There is no room for guns on the streets of Merseyside and we will do everything we can to find the person or people responsible for this incident and bring them to justice.”
Anyone with information is asked to DM @MerPolCC or @CrimestoppersUK on social media or call 0800 555 111 anonymously quoting log 647 of 1st March.