The prime surviving suspect in the Islamic State attacks in Paris that killed 130 people refused to answer questions when his trial for a later shooting incident opened on Monday in Belgium.
Belgium will be on high alert on Monday as the last surviving suspect in the 2015 Paris attacks, Salah Abdeslam, stands trial in Brussels over a shootout that led to his capture.
The trial of 19 suspects believed to be involved in a spectacular $50mn diamond heist at Brussels airport in 2013, opened on Wednesday in the Belgian capital.
Two people were killed and 14 injured when an explosion in the Belgian city of Antwerp destroyed three buildings.
Paris attacks suspect Salah Abdeslam's lawyer asked on Wednesday for his client's trial in Belgium to be postponed from next week's opening, a source close to the investigation said.
Rex Tillerson spoke as he welcomed Belgium's Foreign Minister Didier Reynders to the State Department, and officials confirmed that a Belgian woman was among those killed in the assault.
Granting Catalan leader Carles Puigdemont political asylum in Belgium would be "not unrealistic" if he asks for it, the Belgian migration minister said, underlining his country's position as a contrarian voice in the Spanish standoff.
Belgium is setting up a new English-language court to settle international business disputes in the latest move by an EU country to try to lure companies away from London after Brexit.