Charges of murder and attempted murder have been laid against a Surrey, B.C., man after his two teenage stepsons were killed and their mother badly wounded on Father's Day.

Cpl. Dale Carr of the Integrated Homicide Investigation Team says Mahendra Singh Johal, who also goes by Mahendra Singh, has been charged with two counts of second-degree murder.

The two slain brothers have been identified as 17-year-old Amarjit Gill and 15-year-old Ranjit Gill.

Johal has also been charged with attempted murder in connection with the injury of his 35-year-old wife, who has not been identified.

The 66-year-old man appeared in Surrey Provincial Court Monday afternoon.

Police responded to the home on 126th Street at 11:00 a.m. Sunday morning and found the bodies of the two teenagers.

Johal's wife was taken to hospital in critical condition. Carr says her condition has since been upgraded to stable, after she underwent surgery late Sunday.

Neighbours speaking to CTV News said the family recently moved to Canada from India.

Police have not confirmed reports the suspect may have called 911 himself.

Investigators have also not said how the victims died, but a bullet hole is visible in one of the home's third-floor windows and officers at the scene could be seen picking up what appear to be shell casings around the property Sunday afternoon.