The suspect walked into a Louie's restaurant in the Lake Hefner area and shot two people inside, according to the Oklahoma City Police Department.
Authorities said the motive was otherwise unclear and the investigation at the scene was expected to extend into the early morning hours as law enforcement personnel interview about 100 eyewitnesses. Police said they did not know, but were looking into it.
Mathews said an adult female and a juvenile female were taken to hospital for surgery after the shooting.
One person is confirmed dead and several others are injured after a shooting Thursday evening at Lake Hefner in Oklahoma City.
Capt. Bo Mathews speaks during a news conference at the Oklahoma City Police Department headquarters Friday
All four were in good condition on Friday, according to police.
As Tilghman was leaving and before police arrived, two men confronted him in the parking lot.
Police say the two men had arrived at the restaurant separately, and saw the man open fire.
A woman who answered the phone at the home believed to belong to Tilghman's mother declined to comment when contacted by The Associated Press.
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Witnesses report that the shooter was near the restaurant and fired at people as they walked toward the doors.
Natalie Will and her 12-year-old daughter, Niah, were shot by the suspect -along with Shayla's best friend, Alex. Telephone and text messages seeking comment from the two men were not immediately returned.
School officials say that although Friday is the last day for students, there will be counseling services available for students and staff members.
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The gunman opened fire inside a restaurant, Louie's Bar & Grill.
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