Four Detroit-area Muslims say they've been repeatedly harassed by border patrol agents when returning to the U.S. from Canada, and are now filing suit as a result.

Ali Suleiman Ali and Wissam Charafeddine claim they were detained for hours on the U.S. side of the Detroit-Canada border, and questioned without reason.

"I was shocked. Why do they handcuff me? I am not a criminal," Ali said.

Kheireddine Bouzid, another plaintiff, had been stopped at the border at least five times since 2008 by agents with their guns drawn, according to the lawsuit.

The men also say they've been asked where they worship and how many times they pray each day.

The Michigan branch of the Council on American-Islamic Relations said the treatment of the men amounts to a violation of First Amendment right.

U.S. Customs and Border Protection declined to comment on the case, but said profiling is strictly prohibited.