President Donald Trump on Wednesday accused Mexico of posing a “true threat” to residents of California and Texas, warning that the country must “immediately” address cross-border water and sewage problems.

The president posted on Truth Social, "Mexico must take care of its water and sewage problem, IMMEDIATELY. It is a true Threat to the People of Texas, California, and the United States of America!"

The post was accompanied by a video that says that "Mexico is sending millions of gallons of untreated sewage water into the Tijuana River."

Newsweek has reached out to California Environmental Protection Agency and Texas Commission on Environmental Quality via email on Wednesday afternoon for comment.

On Monday, President Trump threatened new tariffs on Mexico , accusing the

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