DETROIT (AP) - Graco Children's Products has added 403,222 child seats to last month's recall of 3.8 million to replace faulty harness buckles.

But the added seats won't end a dispute with the U.S. government's road safety watchdog. The National Highway Traffic Safety Administration still wants Graco to add 1.8 million infant seats to the recall because they have the same buckles.

Buckles can get gummed up by food and drinks, making it difficult to remove children. In some cases parents have had to cut harnesses to get their children out. The agency says the problem increases the injury risk in emergencies.

Graco says in a letter to the agency that it found additional toddler and harnessed booster seats that should be recalled. The company still believes the infant seats should be excluded.

The recall includes Toddler Convertible Car Seats: Cozy Cline, Comfort Sport, Classic Ride 50, My Ride 65, My Ride 70, My Ride 65 with Safety Surround, Size4Me 70, My Size 70, Head Wise 70 with Safety Surround, Ready Ride, Smart Seat, and Smart Seat with Safety Surround. Harnessed Booster Seats: Nautilus 3-in-1, Nautilus Elite, Nautilus Plus, Argos 70, and Argos 70 Elite.

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