Careless smoking led to that massive fire in northwest Regina yesterday.

The occupant of one of the condos was inside with his four year old daughter refilling a butane lighter when his lit cigarette ignited the butane vapour.

Preliminary damage estimates are pegged at between $2-$4 million dollars depending on whether the owner decides to repair or rebuild.

Damage is extensive to four second story suites, the rest of the block has suffered severe water and smoke damage.

Up to twenty families will be unable to return home.