(LAS VEGSA CBS KXNT)  Two residential fires this week appear to have been sparked by fireworks,  Clark County fire officials said on Friday.  The investigation continues into Thursday’s fire that displaced 50 people and sent three severely burned people to the hospital.

That blaze destroyed two apartment buildings and caused $1.5 million dollars in damage. But Chief Bertral Washington says firefighters were also kept hopping this week by smaller incidents, as grass and dumpsters across the county were ignited by sparks from fireworks on July 4.

Washington issued a plea to the public to turn in all unused fireworks at fire station #18 at Flamingo west of Swenson, or in Laughlin at fire station #76, at 50 E. Laughlin Circle.  No questions will be asked, he said.

Investigators believe the smaller of the two residential fires, which displaced five people from a family home on Tuesday, was definitely caused by fireworks.

Donations for the victims are being accepted by the Red Cross.  Call 369-3674 or go to the Red Cross website.