Brussels attacksIslamist militants planning “near-term attacks throughout Europe”: U.S.

The State Department has issued a warning to Americans planning travel to Europe, saying that Islamist terror groups are planning more attacks throughout the continent.

CNBC reports that in a warning unusual in its scale, the State Department said people should exercise vigilance when in public places or when using mass transportation.

“The State Department alerts U.S. citizens to potential risks of travel to and throughout Europe following several terrorist attacks, including the March 22 attacks in Brussels claimed by Isis,” the warning said.

“Terrorist groups continue to plan near-term attacks throughout Europe, targeting sporting events, tourist sites, restaurants, and transportation.”

About half-a-dozen U.S. citizens were injured in the Tuesday morning attacks, in which more than thirty people died.

“European governments continue to guard against terrorist attacks and conduct raids to disrupt plots,” the warning added. 

“We work closely with our allies and will continue to share information with our European partners that will help identify and counter terrorist threats.”

Officials have launched a massive search for those involved in carrying out and planning the attacks.

Belgian prosecutor Frederic Van Leeuw said police were seeking a man wearing a hat and light-colored jacket.

He said searches were taking place “in several parts of the country,” adding that an explosive device containing nails, chemical products, and an ISIS flag were found in an apartment in the Schaerbeek area of Brussels.

“This is a day of tragedy, a black day,” said Belgian Prime Minister Charles Michel. “I would like to call on everyone to show calmness and solidarity.”