Tunis (CNN)Tunisian President Beji Caid Essebsi confirmed that a third person took part in last week's Bardo museum terror attack in an interview Sunday with French TV Station iTele. 

"There were for certain three terrorists," Essebsi said. "There is one on the run. He will not get far." 

Previously two suspects had been identified -- Yassine Labidi and Saber Khachnaou -- though it wasn't immediately clear if they were the pair killed at the museum by Tunisian security forces. 

He said Yassine was "known to the security services, he was flagged and monitored," but not known or being followed for anything special. 

Authorities have arrested nine people in connection with the attack, including four directly linked to it, according to Essebsi. 

The development came a day after the bodies of four Italian tourists slain in the attack arrived back in Italy, an official with the Tunis Crisis Center told CNN, but 14 victims' remains still lie in the morgue. 

Most of the 23 victims were foreigners, making the process of identification more complicated. Nineteen of them were tourists who'd been on two cruise ships that docked in Tunis. 

French, Spanish, Italian, British, Japanese, Russian and Colombian citizens are among those to have been formally identified so far. 

The bodies of the Italians were met in Rome by Italian Prime Minister Matteo Renzi, who paid his respects to the victims and their families in a brief ceremony. 

Eleven people who were injured in the attack remained in the hospital in Tunisia on Saturday, the official at the Tunis Crisis Center said. 
were the terrorists named in the article?
Previously two suspects had been identified -- Yassine Labidi and Saber Khachnaou --