On Tuesday, a car plowed into the ER lobby of St. David’s North Austin Medical Center, killing the driver and hurting five others, one of them a child in critical condition, authorities said.

The car hit the ER around 5:30 p.m., fire officials said at a news conference at night. They took the driver out of the car and tried to save him, but he died in the ER, authorities said.

The car was a silver sedan with a wrecked front and it was completely in the lobby, photos showed.

Authorities were looking into the crash and did not know why it happened, but the Austin Police Department said it was not on purpose.

The ER lobby had five injured people. The hospital treated one of them and the others, two adults and two kids, went to different hospitals, authorities said.

Capt. Christa Stedman of Austin-Travis County Emergency Medical Services said one child and one adult had life-threatening injuries and two others had minor injuries. They were taken from the scene.

Dr. Peter DeYoung, the hospital’s chief medical officer, said eight patients at the hospital were moved to other places.

The ER doors and an aquarium were hit, but the building was OK, DeYoung said. The ER was not taking ambulances but walk-ins could still come and get help at a temporary triage area at the ambulance bay, he said.

DeYoung said, “We hope to recover tonight and see what happens tomorrow.”

St. David’s North Austin Medical Center has an ER that is open all day. Its website says it is a 441-bed hospital that does maternity and newborn care, other services for women, and many other things, like heart and brain surgeries and robotic surgery.