Prime Minister Benjamin Netanyahu informed a stunned crowd of the suspected Jerusalem bus bombing during a speech he delivered in Binyamina on Monday evening marking 85 years to the founding of the Irgun.

“We will find whoever prepared and dispatched the explosives, as well as those who helped them,” he said. “We will settle accounts with those terrorists.”

Police confirmed that a bus explosion in the industrial area of Jerusalem’s Talpiot neighborhood early Monday evening that wounded 21 people, including one critically, was the result of a bomb, but still stopped short of declaring it a terrorist attack.

Read More: Netanyhau after Jerusalem bus explosion: We will settle accounts with terrorists