(JTA) — Israel reportedly warned Belgian officials several weeks ago about inadequate security at Brussels’ Zaventem Airport. The warning came from Israeli officials charged with evaluating security standards at airports that operate flights to Tel Aviv, Israel’s Channel 2 reported Wednesday. The Israelis found “significant shortcomings” at the airport, which was the scene of two deadly bomb explosions on Tuesday. The Channel 2 report is one of several to emerge since the attacks that have raised questions about Belgium’s defenses against terrorism. On March 23, authorities announced that two of the brothers suspected in the attacks had criminal backgrounds and ties to ISIS and the perpetrators of the terrorist attacks in Paris in November. Turkish President Recep Tayyip Erdogan said one of the brothers had been detained in his country as a foreign terrorist fighter in June and deported back to Europe. Neither brother had been under Belgian surveillance.