A 19-year-old man is facing assault charges in a stabbing near Alderney Landing, one of two violent incidents that occurred during a busy Canada Day concert in Dartmouth on Tuesday night.

The first call for help came at approximately 9:20 p.m. when Halifax Regional Police said a man in his 20s was stabbed in the playground behind the old Dartmouth City Hall.

The teenager was arrested about 10 minutes later and is facing charges of assault with a weapon and possession of a weapon.

He is due in Dartmouth provincial court on Wednesday.

The victim of the stabbing was taken to hospital and has since been released.

About 95 minutes after the stabbing — in what police believe was an unrelated incident — someone was shot inside 60 Alderney Dr., an office building next to the concert venue.

The victim was carried out of the building by a friend. Halifax Regional Police said Thursday they are investigating whether the man — who was shot in the leg — was the victim of a self-inflicted gunshot.

He was taken to the Queen Elizabeth II Health Sciences Centre in Halifax and remains there with non-life-threatening injuries.

The stabbing and shooting both happened as about 15,000 people gathered to watch a Canada Day concert on the Alderney Landing stage.

"We called in some more officers, I believe more security was called in as well and we had enough personnel here to deal with the crowd but these incidents are going to happen whether or not there's more police or more security," said Halifax Regional Police Staff Sgt. Bill Morris.

"These incidents happen, there was enough police officers and security on scene to deal with what had occurred."