Was the Musée d’Orsay Break-In an Inside Job?

I’ve now gotten a link to the Agence France-Presse article on the five suspects detained by police in connection with the after-hours Monet vandalism at Paris’ Musée d’Orsay.
AFP reports:
One of the five suspects…knew how to gain access to the museum because of his job, Culture Minister Christine Albanel said Tuesday. “According to the information the ministry has, one of the five had, for professional reasons, knowledge of various ways into the museum,” said Albanel in a statement.
Does this mean that he had been a museum employee? Qui vivra verra.
And in more AFP news from Paris:
The French parliament on Tuesday approved plans to build a branch of the Louvre Museum in Abu Dhabi, despite opposition.