PLANO, Texas (WFLA/NewsNation) – At least six people were hospitalized after a reported explosion at a Plano home on Monday afternoon.

Three of the victims were taken to a children’s hospital, but officials have not given specific descriptions of victims or their injuries.

Details are scarce, but the Plano fire department tweeted a home exploded and the cause was unknown. Atmos Energy, Oncor and Plano Fire-Rescue are investigating, but were not ready to speculate a cause as of 7:40 p.m. Monday night.

The fire department said only one of the six victims was in the home that exploded, the other five were in “the home next door.” A spokesperson told two other homes were damaged.

Windows on homes across the street were blown out, the department said. They added patrons at a library a mile away felt the explosion.

“We are saddened by today’s tragedy of a house explosion in our city,” Plano Mayor John Muns said in a statement. “Several of our residents were injured. We are keeping them and their families close to our hearts and hoping for a swift and full recovery. Plano Fire-Rescue is working diligently to determine the cause of the blast. We’re asking all of you to keep the victims in your prayers.”