In an unprecedented wave of gun violence, B.C.'s Lower Mainland was rocked by four shootings Tuesday night, including two fatal.

In the first, in Burnaby, a woman was shot dead and a man seriously injured in a shooting that took place on the 25th floor of a luxury high-rise on Madison Avenue at Dawson, near Lougheed Highway.

It happened just after 8 p.m. Burnaby RCMP locked down the building, not allowing people to enter or leave.

The Integrated Homicide Investigation Team says it's too early to say if the shooting is gang or drug-related.

"This could be domestic related for all we know," said Cpl. Dale Carr.

In the second, Surrey RCMP went to the scene of another shooting in South Surrey, on 68th Avenue at 130th Street, in an incident that took place after 8 p.m.

Police say a man in his early 20s is now in stable condition in hospital with gunshot wounds.

RCMP say gunfire was reported in the region only days earlier.

And Vancouver police confirmed a fatal shooting at East 3rd Avenue and Kaslo Street at around 10 p.m.. The male Indo-Canadian victim is in his mid 20s and was slumped over the wheel of his vehicle.

Insp. Bob Thompson of the Vancouver Police says the incident is likely a targeted shooting and the victim had blood all over his face.

He said officers arriving at the scene spotted a car with its emergency lights flashing and glass littering the street.

Police used sniffer dogs to cover a wide area near the Vancouver shooting for several hours after the incident, but have not identified any suspects.

Mounties were called a Surrey neighbourhood to reports of gunfire and found nothing but shell castings, later Tuesday night a man in his twenties arrived at a Surrey hospital for treatment of gunshot wounds.

Surrey RCMP are also investigating a drive-by shooting that that damaged a home at 110th Ave. and 155th St. just before midnight.

No one was hurt but the residence was peppered with bullets.

Late Tuesday night, Surrey RCMP told CTV News they were trying to determine if the first two incidents were connected.

A growing problem

The latest wave of violence comes only a day after RCMP announced "a significant strike against B.C. gangs" with the arrest of alleged UN gang leader Barzan Tilli-Choli, 26, of Vancouver.

RCMP E-division Deputy Commissioner Gary Bass said Tuesday weapons and attempted murder charges have been approved against two members of the UN gang, along with one associate and two women.

The suspects were arrested this weekend following a six-month joint investigation by both the Vancouver Police and RCMP.

Last week, Prime Minister Stephen Harper visited Vancouver to fuel his government's push for Criminal Code changes that would sentence gangsters to longer stretches in prison.

B.C.'s Lower Mainland has been rocked by 24 targeted shootings in a month -- 11 of them fatal.