DRUMHELLER, Alta. - For the second time this week, an inmate has died at a southern Alberta prison.

The Correctional Service of Canada says Martin Pinkus was discovered unresponsive in his cell Wednesday at Drumheller Institution.

Staff tried to resuscitate the 47-year-old man and emergency services were called, but he was pronounced dead at the local health centre around noon.

Pinkus had been serving time since December 1999 for second-degree murder, aggravated assault and assault causing bodily harm.

There was no immediate word on the cause of death.

On Monday, Drumheller staff found a convicted murderer, Earl William Davenport, unresponsive in his cell and could not revive him.