Authorities are trying to figure out why a car crashed into a plasma center in southwest Houston.

It happened around 10:30 a.m. Wednesday at the Grifols donor center located in the 8400 block of W. Bellfort near S. Gessner.

Authorities said a woman in her 20s drove the vehicle into the building. She told police that she accidentally pressed on the gas, instead of the brake.

This happened while her friend, the vehicle's owner, was in the process of donating plasma.

Patricia Flores said she drove the car to the center, and she's not sure why her friend was behind the wheel.

"I don't know what happened," said Flores. "I don't know if she was driving or what she was doing. I just know I seen my car fly through the window."

A spokesperson for the plasma center told Local 2 that two donors were injured in the crash. Both of them were transported by ambulance as a precaution to an area hospital with what police called non-life threatening injuries.

The driver's two young daughters, ages 1 and 3, were in the car at the time of the crash. None of them were injured.

Police say the driver will be cited for failure to control speed.