An explosive incident in Hayward, California, on Thursday morning sent at least six individuals to the hospital, according to local fire officials. The explosion triggered a significant blaze in the area.

The Alameda County Fire Department reported that emergency crews were dispatched to tackle the three-alarm fire. The response involved eight fire engines and two trucks. The explosion occurred around 9:30 a.m., just hours after a construction crew inadvertently struck a gas line.

Among the injured, officials suspect, are two workers who were on the street at the time of the blast. The current conditions of the hospitalized individuals have not been disclosed.

Home security footage from a Ring doorbell camera vividly captured the moment the explosion shook a large building across the street, highlighting the dramatic nature of the event.

Related News: A separate explosion at a house in Southern California recently resulted in injuries to at least eight people, including children.

“We were sitting in the house and it just … everything shook. Stuff fell off the walls. And when we looked at the camera, it was like you were watching a war video,” said Brittany Maldonado, who provided the doorbell cam footage.

Two homes were impacted by the explosion and fire, and a workshop in the back of one of them. Another home has some damage on the side facing the explosion. The neighborhood is a mixed housing and business area.

Pacific Gas and Electric Company says they were notified that a third-party construction crew damaged an underground gas line around 7:30 a.m. while digging. The street has been the area of a construction project that’s been going on for about a year to widen sidewalks and bike lanes.

PG&E crews responded and worked to stop the flow of gas, which was released at multiple locations, by 9:25 a.m. They say the explosion happened just 10 minutes later at 9:35 a.m.