LOS ANGELES (AP) - President Donald Trump has threatened to withhold federal payments to California, claiming its forest management is "so poor."

Trump said Saturday via Twitter that "there is no reason for these massive, deadly and costly fires in California." Trump says "billions of dollars are given each year, with so many lives lost, all because of gross mismanagement of the forests. Remedy now, or no more Fed payments!"

READ MORE: California wildfires already the most destructive in state history

READ MORE: 'Volatile,' 'incredibly dangerous': Images of raging flames as California wildfires burn

The comments were Trump's first about massive wildfires, including a blaze that incinerated most of the Northern California town of Paradise and killed at least nine people.

Wildfires also raged in Southern California, including the town of Thousand Oaks, where a gunman days earlier killed a dozen people at a local bar.

Trump earlier issued an emergency declaration providing federal funds to help firefighters.

READ MORE: 'Volatile,' 'incredibly dangerous': Images of raging flames as California wildfires burn