GOOSE CREEK — A second federal lawsuit was filed Monday stemming from the Stratford High School drug sweep, which drew national attention because police with guns drawn ordered dozens of students to the floors.

The American Civil Liberties Union sued on behalf of 20 students, alleging the raid violated constitutional protections against unlawful search and seizure and excessive use of police force.

"It is a day to raise our voice in solidarity with these students and their families, and with students and families from all around the United States to insist that what happened in Goose Creek on Nov. 5 never, ever happens again at Stratford High or at any of our nation's schools," said ACLU attorney Antonio Ponvert III.

The suit names as defendants Goose Creek, its police chief, a supervisory officer and 15 unidentified officers. It also names the Berkeley County School Board and Stratford's principal.

School officials had not seen the suit and so could not comment, said school district spokeswoman Pam Bailey. The mayor's office said Goose Creek officials would have no comment.

Earlier this month, a similar suit was filed on behalf of other students, and Ponvert said he expects the two will be combined for trial.

The suit filed Monday also alleges assault, battery, false arrest and intentional infliction of emotional distress.

It asks for a permanent injunction blocking the defendants from conducting such raids again. It also seeks unspecified compensatory and punitive damages.

Surveillance cameras showed students on the floor while officers with guns drawn and a drug dog checked about 100 students. Police said the dog sniffed drug residue on 12 book bags but found no illegal drugs and no one was arrested.

The suit said the sweep "left the plaintiffs feeling betrayed, frightened, humiliated and falsely accused" and fearing there will be similar sweeps in the future.

Critics of the raid say it targeted blacks because it was conducted early in the morning at a time when most of the students at the school are black.

Ponvert said the ACLU is "deeply troubled" the raid appears to have targeted blacks but said the suit does not allege equal protection violations or racial motivations.