The Big Three automakers on Wednesday urged quick completion of a federal study of trunk release switches - even as they continued to express skepticism about the devices.

Eleven children under the age of 6, including five girls last week in West Valley City, Utah, have died in the last month after becoming trapped inside car trunks. Advocates have also demanded installation of releases on behalf of crime victims who have been stuffed into trunks by their attackers.American Automobile Manufacturers Association President Andrew Card offered data to help the National Highway Traffic Safety Administration complete its planned study. The association represents General Motors Corp., Ford Motor Co. and Chrysler Corp.

"In light of recent tragedies, the AAMA and its member companies . . . urge NHTSA to begin this study promptly, and we offer our assistance in its rapid completion," Card wrote in the letter, which AAMA officials said was delivered Wednesday.