dear forum members,

my room-mate is accusing me for trying to access his account. He received an email from Google alerting that an unknown device tried to gain access. It indicates the public IP address, Linux OS and Chrome browser.

The public IP is the one from our ISP, so inside of this network. I am the only person using a Linux OS and i also have Chrome browser installed, although i rarely use it. Can someone help me understand what that could mean or not mean? Does this mean that my local network was used for the attack? An attacker within the reach of our Wifi is possible but unlikely. Perhaps my PC is infected with a virus. Could it also be that the router itself has been compromised?