The BBC reports on an incident in which web traffic to U.S. government websites was briefly rerouted to China last year:
The incident, which happened for 18 minutes last April, is published in a report by the US-China Economic and Security review commission.
It found that China Telecom sent incorrect routing information, but it is not clear whether it was intentional.
It comes amid continuing discussions in the US and the UK about cyber-security.
Among traffic rerouted via China was that destined for the websites of the US Senate, the Office of the Secretary of Defence, Nasa and the Commerce Department, the report said.
Read the full annual report from the USCC here.