White House Says It Should Have Sent High-Ranking Official To Paris March

The White House says it erred in not sending a high-level official to an anti-terror march in Paris on Sunday.

More than 40 world leaders attended the rally, which was aimed at showing unity following terror attacks by Islamic militants that left 17 people dead. The Obama administration was represented by the U.S. ambassador to France.

White House spokesman Josh Earnest says that despite the failure to send a higher-ranking official, there should be no doubt about the strong relationship the U.S. has with France.

Earnest wouldn't say what led to the White House's decision to send only the ambassador.

Police believe as many as six terror-cell members may still be at large after the Paris attacks, one of whom has been spotted driving a car registered to the widow of one of the slain attackers.

Two French police officials told The Associated Press on Monday that authorities are searching the Paris area for the Mini Cooper car registered to the widow, Hayat Boumeddiene.

Turkish officials say she is now in Syria.

France has deployed police and soldiers to the Marais district of Paris _ one of the capital's oldest Jewish neighborhoods. Security is being stepped up at sensitive sites around the country, particularly Jewish schools.