Belgian policemen stand guard the road during a police action in the Molenbeek-Saint-Jean district in Brussels, on March 18, 2016.
A police operation was underway on March 18, in the Brussels area home to key Paris attacks suspect Salah Abdeslam whose fingerprints were found in an apartment raided this week, the federal prosecutor's office said.  / AFP PHOTO / BELGA / JAN NAGELS / Belgium OUTJAN NAGELS/AFP/Getty Images