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By Henry Austin

The Eiffel Tower was closed once again Tuesday after workers raised security concerns in the wake of the Paris massacre.

The closure came a day after the attraction reopened following Friday's terror attacks and was lit in red, blue and white to represent the the French tricolore.

Despite heightened security, discussions about further safety measures were still taking place with employees, the landmark's operator Societe d'Exploitation de la Tour Eiffel (SETE) said.

“The main subject of the talks are security measures that must be put in place to ensure that both visitors and staff are safe,” a spokeswoman told NBC News.

In a news release, SETE added that it was making "every effort to minimize” the monument’s closure.

Le Parisien reported that the closure was triggered by a pay dispute, but the spokeswoman denied this and said security was a "common concern” for everyone working at the building.