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At least one person was killed and several others were injured in a house explosion and fire north of St. Louis on Friday morning, officials said.

The bomber struck shortly after 1:20 a.m. in St. Louis County, northwest of Spanish Lake, county police said in a news release. Authorities and firefighters who called to the scene said the house was on fire and the man outside it was injured and died in the blaze.

Four others who were in a critical condition were rushed to hospital.

The fire, which caused damage to the Main Elementary School, flared up again on Monday

A house in Missouri caught fire after an explosion, leaving one dead and four in critical condition.

A house in Missouri caught fire after an explosion, leaving one dead and four in critical condition.

Neighbors said they heard an explosion and their house shook due to the blast. Firefighters worked to put out the blaze, which caused debris to form on nearby lawns.

The home was set on fire after the Missouri dog turned on the stove, the videos revealed

Authorities did not say what caused the blast, but police said detectives were investigating the bomb and Orson. Upon arrival, police declined to provide further information about the fire and those injured and dead, citing an ongoing investigation.