Youngsters were at the Arcadia Palms apartment complex in Las Vegas . Residents then heard an explosion and saw a huge plume of smoke . Police say it was accidental and they are not expecting to file any charges . The blast occurred around 1:30 a.m. local time on Sunday morning when one person opened fire with a handgun inside his apartment, police said.
Youngsters were at the Arcadia Palms apartment complex in Las Vegas . Residents then heard an explosion and saw a huge plume of smoke . Police say it was accidental and they are not expecting to file any charges . Authorities said the pair who died were related .