A Jordanian border official said at a news conference Wednesday that Islamic State militants are using homing pigeons to deliver messages to operatives outside its so-called caliphate.

Brig. Gen. Saber al-Mahayreh said Jordanian troops captured one of the pigeons sent by ISIS fights in Iraq to a person in Jordan with a letter addressed to him. Al-Mahayreh said militants are using outdated ways to get its messages out, aside from using social media.

“The jihadists tied a letter with a phone number to the foot of the bird, which was flying to a Jordanian resident,” he said.

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