Homeland Security officials in California have been ordered by the Trump administration to investigate the president’s claim that at least half the state’s raging infernos were set by illegal immigrants.

“California’s open-border policies have come home to roost as BAD HOMBRES set fire to the state,” Trump wrote in an early morning tweet. “Need that WALL the Democrats REFUSE to fund. INCREDIBLE!”

In a statement from the office of California Gov. Jerry Brown, the governor said he had run out of statements. In a later tweet, Brown wrote: “I thought Mexico was going to pay for the wall.”