French police have sealed off the site of the quadruple murder near Lake Annecy in 2012.
Authorities say its part of a normal situation review and is not linked to any new information.
The Chevaline killings claimed 4 lives in September 2012. A British engineer Saad al-Hilli was shot dead with his wife and her mother. A passing cyclist was also killed.
Two children, aged 4 and 8 at the time survived.
The killings remain a mystery.
Police say the investigations are also aimed at updating possible inconsistencies in testimonies.
Flu cases explode
Public sector workers march in Geneva
Most expensive apartment in Zurich
Swiss winner returns Eurovision trophy
Call for 130 limit
Firework initiative causes sparks in parliament
