STAMFORD, Conn. (AP) – The American Civil Liberties Union of Connecticut has begun an investigation into a new practice of random searches on Metro-North trains, a spokesman said Monday.

The searches began last week after the latest attacks on London’s transit system. The Connecticut ACLU joins its affiliates in New York and New Jersey in raising concerns about the practice.

“We believe it opens up the door to profiling and potential discrimination,” said Roger Vann, executive director of the ACLU of Connecticut.