US raises threat level in response to British threat

The US government raised its threat level to the highest level for commercial flights from Britain to the United States early Thursday in response to a reported terror plot in London and also stepped up the

general level for all flights within the US or entering the country.

"We believe that these arrests (in London) have significantly disrupted the threat, but we cannot be sure

that the threat has been entirely eliminated or the plot completely thwarted," said US Homeland Security

Secretary Michael Chertoff in announcing that the threat level for flights from Britain to the United States has been raised to the highest "severe or red" level. (AP)