The U.S. porn industry has been rocked by news a fourth adult movie star has tested postive for Hiv.

Filming ground to a halt last month (Aug13) when officials at the industry's trade body The Free Speech Coalition issued a moratorium on shooting after actress Cameron Bay learned she had contracted the disease.

Now it has emerged another temporary suspension was ordered on Friday (06Sep13) after three more adult actors tested positive for the virus. One has been named as Rod Daily.

A spokesman for the Aids Healthcare Foundation confirmed the latest case, telling the Los Angeles Times, "We were approached by a male performer who told us he had tested positive."