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WILTON, Calif. (KTXL) — Four people, including a pregnant woman, were taken to UC Davis Medical Center with major injuries after a small plane crashed Thursday in a front yard of a Wilton home.

The single-engine plane crashed near the intersection of Alta Mesa and Blake roads.

“We have been out here since ’93, there have been a couple airplane crashes but nothing like this,” said Nancy Mackey, who lives near the crash site.

“I saw the plane was right next to my window and I felt like something is wrong,” said Mackey’s daughter-in-law, Maggie.

People in the area said the plane took off nearby and wasn’t in the air for very long before it crashed, bursting into flames.

The woman, two men and a teenage boy who were on board at the time of the crash all sustained major injuries.

Sacramento Metropolitan Fire Capt. Parker Wilbourn said people in the area helped before first responders could get to the crash site.

“There were some bystanders that did help the rescue effort,” Parker explained. “The fire resources that came on were able to extricate.”

A small grass fire broke out, resulting in large flames. With dry conditions and fire season still in effect, many in the area worried about a new wildfire, but fire crews were able to stop it and no homes were damaged.

National Transportation Safety Board investigators are expected to arrive Friday morning to start their investigation.

This story is developing. Check back for updates.