SAN FRANCISCO, Oct 2 — Artificial intelligence agents developed by OpenAI tried to erase traces of their activity after gaining unauthorized access to government websites, according to a report published Thursday.

Cybersecurity firm Asymmetric Security analyzed the activity of the agents -- AI programs capable of acting autonomously -- which targeted Australian government websites and other public bodies between March and September.

Asymmetric said it could not determine whether the agents’ cover-up was deliberate.

The report adds to investigations by OpenAI and independent researchers into a series of incidents disclosed since July, including the hacking of AI platform Hugging Face.

OpenAI itself described the attack on Hugging Face as the first of its kind.