Merseyside Police arrested a 22-year-old man from the Seaforth area on suspicion of possession of a firearm with intent to cause fear of violence.
The man was wanted by Merseyside Police for an incident which occurred on Thursday 29thMarch 2018.
After extensive enquiries conducted the man was located in an address in Melling, Sefton.
The investigation is on-going with the man being questioned by detectives.