Members of the Royal Air Force wrote a personal message on a missile targeting ISIS fighters after the militant group claimed responsibility for Monday’s deadly attack at an Ariana Grande concert.

A photo circulated Thursday of the missile with the words “Love from Manchester” scrawled on with black marker. A spokesperson for the RAF told The Sun it was real.

“The RAF can confirm the photo was geniune,” the spokesperson said.

Members of a unit stationed in an undisclosed location in the Middle East wrote the message. On Monday a man, identified as Salman Abedi, blew himself up in the foyer of the Manchester Arena, killing 22 people and injuring 119 others. The attack targeted an event that was filled with mostly women and children.

Messages written on missiles and bombs date back to World War I, a tradition that has continued over the years.

Read more about the history of sending messages on missiles on Fox News