MANVEL, Texas (AP) — Officials blame a marital dispute for a gunman wounding his wife and her sister and fatally shooting two other relatives before killing himself at their Houston-area home.

The Brazoria (bruh-ZOH'-ree-uh) County Sheriff's Office says 28-year-old Muhammad Hasan Nawazkhan died Sunday of a self-inflicted gunshot wound.

Lt. Varon Snelgrove on Monday said Nawazkhan and his wife, two of her sisters and the husband of one of those siblings all lived at the residence in Manvel.

Snelgrove says dispatchers early Sunday received a call from Nawazkhan saying he shot his 31-year-old wife. Lesly Paredes was hospitalized Monday in critical but stable condition.

Her wounded sister, 36-year-old Maria Paredes-Paz, was treated and released from a hospital.

Snelgrove says another sister, 49-year-old Alexy R. Garcia, and husband 30-year-old Carlos Antonio Garcia-Cerna, died at the scene.