Evenflo Company is voluntarily recalling more than 1.3 million child safety seat buckles due to the risk children could not be removed quickly in an emergency.

The National Highway Transportation and Safety Administration said Friday that the recall includes buckles used in a number of children's convertible and booster seat models manufactured between 2011 and 2014.

Not all seats made during that time are included. The recall includes some of Evenflo's Momentum, Chase, Maestro, Symphony, Snugli, Titan, SureRide and SecureKid models. The affected seats have model number prefixes of 306, 308, 310, 329, 345, 346, 371 or 385.

The buckle may become stuck in a latched position, making it difficult to remove a child from the seat. This could prove critical to a child's safety in the case of an emergency.

Evenflo will alert registered owners this month and provide replacement buckles and instructions for installation.

The company said on its website that the harness crotch buckle may become resistant to unlatching over time, due to exposure to food, drink and other common contaminants. It said there is no risk if the buckle is functioning normally.

Evenflo, based in Piqua, Ohio, has received no reports of injuries to children in connection with the recalled buckles.

NHTSA began investigating several models of Evenflo seats in January. Regulators said they are still investigating the safety of one of Evenflo's rear-facing infant seats.

It's one of several recent recalls involving...