From the AP:

Israeli fighter jets scrambled to intercept an unidentified aircraft suspected to be hostile this week, only to find that it carried none other than Tony Blair, a top military official said Friday.

…The plane failed to respond to repeated control tower radio calls demanding that it identify itself, said the official, who spoke on condition of anonymity because he was not permitted to speak to the media.

As is common practice in such a case, the Israeli air force sent two fighter jets to intercept the aircraft. They flew above the former British prime minister’s plane and quickly established contact. The pilot told them of the traveler on board, the official added.