A federal judge has invalidated a New York City transit system rule that allowed police officers to demand identification documents from anyone riding the subway.

The ruling came in a lawsuit filed by two vintage train aficionados who were stopped by the police while taking photographs at a station in Queens.

Both men were ticketed for �unauthorized photography.� That violation was later dismissed because photography in the subways isn�t illegal.

One was also ticketed for refusing to produce his driver�s license until the officer put him in handcuffs.

U.S. Magistrate Cheryl Pollak ruled Friday that a rule requiring riders to provide any documents requested by police was �unconstitutionally vague� and encouraged �arbitrary and discriminatory enforcement.�

A spokesman for New York City Transit says the agency is still reviewing the ruling.

(AP)