02/11/2015 09:50 EST | Updated 04/13/2015 05:59 EDT

Michael Douglas Sheets, convicted Calgary arsonist, escapes from Victoria prison

Michael Douglas Sheets, a convicted arsonist responsible for the deaths of two Calgary children, has escaped from a B.C. prison. 

He escaped during an "escorted temporary absence" from the William Head Institution in Victoria on Tuesday at 1:10 p.m. PT. 

Sheets, 44, is serving a 14-year sentence at a minimum-security federal prison for manslaughter and arson in connection with a 2004 incident in which the former crack addict lobbed a Molotov cocktail into the Calgary home of six-year-old Ali Al-Mayahi and his four-year-old sister, Saja.

Correctional Services Canada says it will investigate the circumstances surrounding his escape and is working with police to locate Sheets as quickly as possible.

Anyone with information on the whereabouts of Sheets is asked to contact police.

Sheets is described as:

- 44 years old.

- 5-6 in height.

- 141 pounds.

- Fair complexion, hazel eyes and grey hair.

- Several tattoos include a skull and wings, hearts, and “4 ever” on the right forearm. 

Sheets testified at his trial that he was paid $60 along with another addict to throw the firebombs into the Calgary condominium where the two children lived. Their mother, Salima Barih, jumped from the second storey of the home after not being able to reach her children.

Four other people were charged in connection with the case, which involved an affair between the father of the children and the wife of the man who hired the arsonists.