The four mysterious family disappeared in France

French police have opened a murder investigation into 
the mysterious disappearance of a family of four in 
western France two weeks ago.

Bloodstains found in the family's house near the city of Nantes match the DNA of three of them, officials say.

There has been no activity in any of their bank accounts
 or mobile phones since they went missing, they add.

Reports suggest the father once suffered from depression while his son had psychological problems.

The Troadec family - Pascal and Brigitte, both aged 
around 50, their son Sebastien, 21, and daughter Charlotte, 
18 - were last seen on 16 February. Authorities were
 informed of the family's disappearance by Brigitte's sister.

Investigators searched their two-storey house and found
bloodstains on Sebastien's phone and on Brigitte's watch,
prosecutor Pierre Sennes said.

Traces of blood were also found under the stairs and, according to Mr Sennes, it appeared that someone had
 tried to wipe them away.

The beds had been stripped, with some sheets drying on 
an indoor rack. Wet clothes were still in the washing 
machine and food was going off in the refrigerator.

"It's as if the life of the house was frozen in time," Mr 
Sennes said.

The family's two cars were still parked in front of the
 house but investigators have not yet found Sebastien's 
car.

Sebastien had been sentenced to carry out community 
service after being convicted in 2013, when he was a 
minor, for making death threats on his blog, Mr Sennes 
added.

French newspaper Le Monde reported that Sebastien 
had posted on a video game online forum: "What do I 
hate the most? My reflection." And: "What makes me 
sad?  My life."

And on Twitter, he had written: "If one really knew what 
was going on in my head, one would think I was a crazy person with no morals."

An investigation into murder, abduction and illegal confinement has been opened, the prosecutor says.