WASHINGTON, D.C. --- Toyota is recalling 90,000 model-year 2008 Highlander and Highlander hybrid SUVs because of potential problems with securing child safety seats in third-row seats.

The locking mechanism on the seat belts doesn't work properly when certain rear-facing child safety seats are used, which could cause the seats to move, according to the National Highway Traffic Safety Administration.

"As such, this could discourage the use of a child restraint and in the event of a crash, the child may not be adequately protected, possibly resulting in injury," the NHTSA said on its Web site (www.nhtsa.dot.gov).

NHTSA uncovered the problem during compliance testing on one type of two-piece rear-facing child safety seat. 

Toyota said the problem has not resulted in any reported accidents or injuries. The automaker will notify vehicle owners in early June. Dealers will correct the problem free of charge.