The two ministers offered to resign Thursday but was turned down by Prime Minister Charles Michel, who ask them to stay on.
The admissions by justice minister, Koen Geens, and interior minister, Jan Jambon, came after the bombing on Tuesday.
“What’s essential in the story is that with the passing on of the information from Turkey and with the passing on of the information within Belgium, we have been slower than one could have expected under those circumstances,” Mr. Geens said on Flemish television in Belgium. “So, the information was passed on, but we have not been diligent, or probably not diligent enough.”
Mr. Jambon said in an interview with Le Soir newspaper that there had been “Two types of mistakes, at the level of the Justice Ministry and at the level of the liaison officer in Turkey, which involves the Interior and Justice ministries.”
"In time of war, you cannot leave the field," Jambon, a right-wing Flemish nationalist, said.
The Islamic State (IS) group said it was behind the attacks in a statement issued on the IS-linked Amaq agency.