ChatGPT maker OpenAI has revealed that an autonomous AI agent which hacked a popular platform for computer programmers also attempted to breach four other companies during the incident.

In an update late Tuesday to a blog post detailing its probe into the incident, OpenAI said its AI agent also got into accounts on four “publicly-available services,” though it did not name the companies.

The revelation broadens a cyber incident that OpenAI described as unprecedented and that began when two of its models hacked Hugging Face, a site developers use to store and share AI models and code.

OpenAI admitted last week that during testing, the models powering the agent broke out of their confined environment and connected to the internet to find ways to infiltrate Hugging Face.

In the company’s update of the events leading to the hack, OpenAI said it found a handful of instances where the AI models came across login details that other companies had left exposed online, and used them to get into accounts on outside services.