The bodies of a Quebec father and his two adolescent children who were found dead Tuesday morning in the family's burned-out garage have police investigating a possible murder-suicide.

The identities of the father and his two children have not been released, and provincial police said autopsies still needed to be performed to determine the identities and the causes of death.

However, friends and relatives left notes of sympathy on the Facebook pages of Jocelyn Marcoux, 47, Lindsay Brillant-Marcoux, 13 and Karen Brillant-Marcoux, 11.

One woman wrote on Jocelyn’s page: "Your children will always be with you now. Your gesture is not excusable, but is understandable. Be at peace with your angels."

Details on Jocelyn’s Facebook page indicate that the father was involved in a custody battle.

Hours before the fire consumed the garage, the elder Marcoux published a lengthy note on his Facebook page denouncing a court decision that allowed his ex-wife to have partial custody of the children.

Marcoux had full custody of the children and neighbours said the kids had been with him a little more than a year.

However, a lawyer representing Marcoux’s ex-wife said the judge’s decision in that case had not yet been made.

The couple was set to appear in Quebec Superior Court on Tuesday to discuss custody and alimony issues.

In his letter, Marcoux said fathers must take justice into their own hands because they won’t be able to get it from the courts. He also wrote that he feared losing custody of his children.

The letter reads: “For all the fathers out there, it’s official. If you don’t get justice yourself, you’ll never have it.”

Sgt. Ronald McInnis, a provincial police spokesman, said traces of gasoline were found in the garage and the doors to the garage were blocked by a parked car.

“After the firemen finished their work, they found three bodies inside (the garage),” he said.

Richard Gagne, spokesperson with the provincial police, said it could be several days before autopsies are completed.

With a report from CTV Montreal’s Legal Affairs Reporter Stephane Giroux and files from The Canadian Press