The Latest: No specific intel about Paris-type threat to US
The U.S. Homeland Security secretary says American officials have "no specific credible intelligence" about a potential threat from a Paris-type attack directed at the United States.
Jeh Johnson says authorities always have concerns about "potential copycat acts" and "home-born, home-grown violent extremism."
Discussing the situation in Brussels, Johnson says American officials are in constant touch with law enforcement and intelligence authorities in Europe and elsewhere.
The Czech Republic's defense minister says that his country would be able to deploy about 200 soldiers in the case of an international ground operation against the Islamic State group.
A burst of unexplained noises have scared some travelers at the Gare du Nord train station in Paris, where citizens are on edge after last week's attacks that killed 130 people.
The source of the mayor's information about a second suspect wasn't immediately clear and the prime minister's office declined to comment.
France's defense minister says French aircraft carrier Charles de Gaulle sent to help operations against Islamic State militants in Syria will be "operational" from Monday and "ready to act."
France has intensified its aerial bombing in Syria since IS militants attacked a concert hall, cafes and restaurants and a stadium in Paris, killing 130 people and wounding hundreds.
British Prime Minister David Cameron is expected to outline his plan for combatting the Islamic State group this week as he moves toward seeking Parliament's approval for airstrikes on the group's Syrian strongholds.
Cameron expects the passage of a United Nations Security Council resolution calling for united action against the Islamic State group to bolster his chances in Parliament.
Brussels residents are waking up to largely empty streets as the city enters its second day under the highest threat level and the manhunt continues for a suspect missing since the Nov. 13 attacks