Even after two attacks on the London tube system, the New York City branch of the ACLU is suing to stop the NYPD from protecting the subways: NYCLU sues city over subway searches. (Hat tip: LGF readers.)

The New York Civil Liberties Union will file suit against the city Thursday to keep police from searching the bags of passengers entering the subway, organization lawyers said.

The suit, which will be filed in U.S. District Court in Manhattan, will claim that the two-week old policy violates constitutional guarantees of equal protection and prohibitions against unlawful searches and seizures, while doing almost nothing to shield the city from terrorism.

It argues that the measure also allows the possibility for racial profiling, even though officers are ordered to randomly screen passengers.

“While concerns about terrorism of course justify — indeed, require — aggressive police tactics, those concerns cannot justify the Police Department’s unprecedented policy of subjecting millions of innocent people to suspicionless searches,” states the suit, a partial copy of which was provided to Newsday.