Pallbearers cary the coffin of one of the two Spanish tourists who were shot dead in an attack on a museum in Tunisia after landing at Barcelona’s airport March 20, 2015.

Tunisia’s President Beji Caid Essebsi said on Sunday that a third gunman involved in an attack that killed 23 people, mostly foreign tourists, at a Tunis museum last week was on the run.

Confirming reports that there had been a third attacker along with the two shot dead by security forces, Essebsi also said on French TV that a monument would be built to commemorate the dead.

“For sure there were three because they have been identified and filmed on surveillance cameras,” Essebsi said in a televised interview with Europe 1 radio, iTELE and Le Monde newspaper.

“There are two who were executed and one who is on the run somewhere. But in any case, he won’t get far,” Essebsi said.

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