Did fake passports stop other would-be terrorists before the Paris attacks?

Austrian authorities said a 28-year-old Algerian and a 34-year-old Pakistani reached Greece on Oct. 3 along with dozens of other people following a sea journey undertaken by tens of thousands of refugees and migrants trying to cross into the European Union.

“One of the suspects confessed that he had arrived in Greece with two men, who are believed to be among the Paris attackers,” Salzburg prosecutors office spokesman Robert Holzleitner told NBC News.

Prosecutors called the investigation “highly complex.”

However, Holzleitner denied recent media reports suggesting the pair had admitted planning terrorist attacks in Europe.