Ten more suspects have been arrested in three European countries as police step up efforts to prevent further attacks after the Brussels bombings, the BBC reports.
Seven were detained in Brussels, two reportedly in Germany and one in Paris.
An investigation is continuing into Tuesday’s bomb attacks, which killed 31 people in Brussels and have been linked to November’s Paris attacks.
US Secretary of State John Kerry, visiting Brussels, said that so-called Islamic State (IS) would be destroyed.
Standing alongside Belgian Prime Minister Charles Michel, he expressed condolences for the victims and solidarity with Belgium, declaring “Je suis Bruxellois”.
The Western alliance would continue its fight to destroy IS, Mr Kerry said.
“We will not be intimidated. We will not be deterred.”