BRENTWOOD - Police say they believe a fatal fire in Brentwood Sunday morning was set intentionally.

According to authorities, 23-year-old Ricardo Romero-Flores set his ex-girlfriend's car on fire and that those flames spread to her home.

Officials say Flores' ex-girlfriend's brother, 22-year-old William Hernandez, was killed in the fire. They say the homeowner was also injured, but is expected to be OK.

Flores has been arraigned on second-degree murder charges.