Oklahoma City: A gunman opened fire inside an Oklahoma City restaurant during the dinner rush, wounding a woman and two girls before two armed citizens shot him dead outside, police said on Friday.

The suspected gunman, 28-year-old Alexander Tilghman, was armed with a pistol when he entered Louie's On The Lake around 6:30pm on Thursday. A 39-year-old woman and two juvenile girls were shot and wounded, while an unnamed man fell and broke his arm while fleeing, according to a statement from police.

Tilghman was then shot dead outside the restaurant by two citizens identified by police as Juan Carlos Nazario and Bryan Wittle.

All four victims were reported in good condition on Friday, according to Oklahoma City police Captain Bo Mathews. A suspected motive for the shooting hasn't been released.

Dennis Will said his daughter and granddaughter were among those shot. Talking with reporters outside the hospital where the shooting victims were taken, Will said his daughter called him after the shooting and said they had been shot while entering the restaurant for a birthday dinner.

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. Telephone and text messages seeking comment from Nazario and Wittle were not immediately returned.