LOS ANGELES (AP) — California public health officials have issued an alert after finding “very strong evidence” that an adult-film actor became infected with HIV as a result of unprotected sex on an out-of-state film shoot.

The Department of Public Health alert states a male actor tested positive for HIV after engaging in unprotected sex with several other male actors during two separate film shoots. He had tested negative before the shoot.

One actor from the second shoot has since tested newly positive for HIV. According to the health department, lab results indicate the first actor who tested positive “probably transmitted” HIV to the second.

A California-based trade group for the adult-film industry declined to comment.

A health department official says the apparent transmission occurred in Nevada.

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