WASHINGTON (AP) — Ikea is recalling 29 million chests and dressers that can easily tip over and trap children underneath. Six children have been killed and three dozen others injured, and federal safety officials on Tuesday urged consumers to take immediate action.

The Swedish retailer announced the recall Tuesday, saying the furniture can pose "a tip-over and entrapment hazard that can result in death or injuries to children" if it is not properly anchored to a wall.

"Consumers need to act immediately because it's a very present hazard, especially if you have kids in your home," Elliot Kaye, chairman of the Consumer Product Safety Commission, said in an interview.

The CPSC underscored the risk at a news conference Tuesday that included live demonstrations of chests tipping over.

Kaye said consumers "need to either get their anchor kit from Ikea for free and install it on their furniture, take it back to the store for a full refund or have Ikea come and pick it up from their homes for free."

The recall, which only applies to customers in the U.S. and Canada, is for several types of Ikea chests and dressers, including the Malm line. Ikea said the units under the recall are children's chests and drawers taller than 23.5 inches and adult chests and dressers taller than 29.5 inches.

The recalled units were sold at Ikea stores "at various times through June 2016," the company said.

All of the children killed were 3 years old or younger, the CPSC said. One of the children was killed about 27 years ago. The other deaths were more recent, between 2002 and 2016. The CPSC said it received 36 reports of children who were injured.

Ikea said that anyone who owns one of those chests and dressers and has not attached them to a wall should remove it out of reach from children. Ikea is offering free kits to attach the chests and dressers to a wall.

Customers who don't want to keep the recalled furniture can ask for a refund. Ikea said it will give a full refund to owners of recalled chests and dressers made between 2002 and 2016. For recalled units made before 2002, customers can receive a store credit for half the original price.

Ikea USA president Lars Petersson said in a statement that the chests and dressers were sold with instructions saying that they had to be mounted to walls. Last year, the company offered free wall-mounting kits to owners of its Malm chests and dressers after reports of children's deaths.

Kaye said IKEA is now working with CPSC to bring safer designs to the markets so that furniture is more stable.

"I expect the rest of the furniture industry to do the same," said Kaye.