A surgeon at the University Medical Center in Tucson, Ariz., says Rep. Gabrielle Giffords is able to communicate, following simple commands.

Although responding to commands is encouraging the Arizona Congresswoman Gabrielle Giffords  remains in critical condition as investigators try to figure out what motivated a gunman to shoot her and several others, killing six people and injuring others. 

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Dr. Michael Lemole said at a news conference on Sunday that Giffords responded to doctors’ commands.

 Lemole says the gunshot went through the left side of her head and that surgeons worked to reduce pressure from swelling in the brain by removing bone fragments.

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Giffords was shot by a gunman on Saturday as she met with constituents at a supermarket. Six others were killed, and 14 wounded, including the congresswoman.

For more information on the suspect click here.

It’s stunning to Congresswoman Candice Miller, of Harrison Township, who knows Giffords.  She says they share a love of space since Giffords’ husband is an astronaut. For further information on reaction to the shooting.

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Associated Press contributed to this report.