LOS ANGELES -- An adult entertainment Web site has sued online retailer Amazon, accusing the company and its search engine subsidiary, A9.com, of copyright infringement for displaying thousands of the Web site's explicit images in response to computer users' searches.

In the lawsuit filed Wednesday in U.S. District Court in Los Angeles, Beverly Hills-based Perfect 10 Inc. is seeking an injunction against the Seattle-based retailer and unspecified damages.

Under U.S. copyright laws, plaintiffs can seek up to $150,000 for each instance their copyrights are infringed upon, said Russell Frackman, an attorney for Perfect 10.

Amazon.com Inc. spokeswoman Patty Smith said Thursday she couldn't comment on the lawsuit because the company hadn't seen it yet.

Perfect 10, which also publishes a magazine, filed a similar suit in November against Internet search engine operator Google Inc.

The adult Web site operator claims search engines like Google and A9 undercut its revenues by giving Web surfers an unauthorized free look at its explicit images. The company charges a monthly membership fee of $25.50 for its Web site.

Perfect 10 claims it has sent several warning notices to Google and Amazon, but both sites continue to display some 2,500 images from Perfect 10 and other adult Web sites without permission.

The Google case remains in the discovery stage, Frackman said.