That isn't the only claim from the police about this case that seems odd...
Virtually no one tries to use completely counterfeit passports, which is what they're describing here. With all the fancy security features in modern passports, a total fake can be spotted with the naked eye. If they really bought homemade passports (as opposed to real documents with a substituted photo, or from a holder with a similar appearance), they weren't very bright.
They spent two weeks in Thailand and have entry records, so this doesn't appear to be accurate...and they were trying to board a flight to Oman, not Spain. The police seem to have mixed things up a bit in the process of trying to make their interception appear more heroic.