Major online shopping corporation eBay has been hacked, the company announced Wednesday, and has asked all users to immediately change their passwords. 

Or has it? The warning message was deleted a short time later without any explanation from the company, who then stated that there is no evidence of specific information or account information stolen.

EBay stated later Wednesday that a private message will be sent to individual users with details and instructions in the event that their cyber-security is confirmed compromised. 

The message was also posted in a press release from online payment service PayPal, a subsidiary of eBay. PayPal users can keep calm, however; its client details are kept on separate servers, according to Channel 10

US companies have been on high alert this week, after the US officially announced that charges had been filed against Chinese military officials for stealing technical and business secrets from nuclear energy companies and other firms.