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Twins toddlers died in a house fire in Eastern Kentucky Monday, and their parents both are in the hospital with severe burns, the Lexington-Herald Leader reported.

Dennis Chad Howard, 39, and his wife, Allyson Howard, 42, are being cared for at a burn center in Augusta, Ga.

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A cousin of Allyson’s, Kinsey Harris, said Allyson’s body was 84 percent burned and Dennis’ was 72 percent burned. Both went into surgery Tuesday morning, Harris said.

The twins — both 3 years old — were identified by family members as 3-year-old Alex and Olivia Howard.

Their older brother, Ozzy, was not at the home at the time of the fire.

The fire occurred around 11:18 a.m. Monday after some kind of explosion. The cause of the fire remains under investigation.