Vitinha raised nearly €40,000 through a Leetchi fundraiser after an explosion in Trévoux killed his cousin's two children and prosecutors said the blast followed a woman deliberately leaving gas running to take her own life.The victims were brothers aged three and five, and the woman also died; 13 people were treated in hospital and dozens of apartments and several houses were rendered uninhabitable.Emergency services including about 50 firefighters, 36 vehicles and 45 gendarmes searched the wreckage, Mayor Marc Péchoux said residents were evacuated and authorities set up rehousing and psychological support while the Bourg-en-Bresse prosecutor opened an investigation.