BRUSSELS (TheBlaze/AP) — Belgian prosecutors say an explosive device containing “chemical products” and nails were found in law enforcement raids following Tuesday’s terror attacks in Brussels.

The searches were taking place in the Schaerbeek neighborhood of Brussels, Belgian prosecutor Frédéric Van Leeuw said, the New York Times reported.

An Islamic State flag was also found at the site, according to various media outlets.

The terrorist organization has claimed responsibility for the attack.