Two seniors are in hospital after suffering serious injuries in a home invasion near Wetaskiwin this week.

The elderly couple lives in a rural home and were expecting one of their sons to drop in for dinner Tuesday night.

The couple answered a knock at the door when a man walked in and attacked them, then stole their vehicle.

Their son arrived shortly after the attack, finding his 83-year-old mother and 86-year-old father unconscious.

The quick response by paramedics and police saved his father's life, said the couple's other son John Gilchrist, a popular restaurant reviewer in Calgary.

"My father has some brain bleed and various cuts and contusions and a couple of black eyes," he said.

"My mother is in the trauma unit. She has cuts and abrasions and severe bruising, a broken bone in her cheek."

Both ended up at the University of Alberta Hospital in Edmonton.

Gilchrist said his father is under sedation and has not regained consciousness since the attack, but is hopeful his parents will recover.

"They're a couple of tough old people and it will take a lot more than this to put them down," he said.

His mother remembers nothing from the attack.

Gilchrist said the attack was a random event.

A car was found overturned in the ditch less than three kilometres north of the farm, he said. It's believed the driver of the car is the suspect in the home invasion and vehicle theft.

Police arrested a 27-year-old man in connection with the home invasion.

The suspect faces several charges including two counts of aggravated assault.

With files from CBC's Scott Stevenson