The London Police Service (LPS) made an arrest after responding to the area of Rectory Street and Hamilton Road at approximately 10:30 a.m. on Saturday.
Police said paramedics requested assistance after a patient was found to be in possession of what appeared to be a firearm during transport in an ambulance.
Following an investigation, a 26-year-old man was arrested and what turned out to be a replica firearm was recovered by police.
No injuries have been reported due to the incident.
A tweet sent out by LPS Operations, early in the investigation, asked residents to avoid the area.
Police activity in the area of Rectory and Hamilton. Please avoid the area #ldnont @LPS_Operations @lpsmediaoffice
— LPS_Operations (@LPS_Operations) June 4, 2022
The investigation is still ongoing, anyone with information is asked to contact LPS at (519) 661-5670 or Crime Stoppers at 1-800-222-TIPS (8477).