London police were called to a west London plaza for a stabbing and the sound of a gunshot early Friday.
Police say they were called to the parking lot of the Sherwood Forest Mall on Wonderland Road North just after midnight for a disturbance.
According to EMS an 18-year-old man was taken to hospital with non-life-threatening injuries. Police confirmed that the man was suffering from a stab wound.
A gunshot was also reported in the area.
Police found evidence that a gun had been fired and were able to recover a firearm during their investigations. No one was injured as a result of the gunshot.
Four people were arrested on scene and were being held in custody pending court appearances.
Four London men, ages 21, 22, 25 and 26 have all been charged with multiple firearms offences and two drug trafficking counts.
In addition, the 26-year-old has been charged with dangerous operation of a vehicle and the 21-year-old has been charged with mischief under $5,000.
Police do not believe the incident to be random.
Several police cruisers were observed in the area of the Tim Hortons at Sherwood Forest Mall.
The London police Major Crimes Unit has taken over the investigation.
