A Japanese photojournalist was sentenced Sunday to 18 months in prison for causing the explosion at Amman airport on May 1 that killed one airport security guard and injured five others.

A Jordanian military tribunal handed the sentence to Hiroki Gomi, 36, a photojournalist for Japan's Mainichi Shimbun.

However, Jordan's King Abdullah II is prepared to pardon Gomi, a source close to the royal family said earlier, as the king apparently considers the case an accident.