Texas health officials on Tuesday reported that an immunocompromised patient with monkeypox has died. This would be the first known death from the virus in the United States, if it is confirmed that monkeypox played a role.

The patient was a “severely immunocompromised” adult resident of Harris County, the Texas Department of State Health Services announced in a news release. Health officials said it is still under investigation what role monkeypox played in the death.

“Monkeypox is a serious disease, particularly for those with weakened immune systems,” said Dr. John Hellerstedt, DSHS Commissioner. “We continue to urge people to seek treatment if they have been exposed to monkeypox or have symptoms