KEMAH, Texas (AP) - Authorities say a 16-year-old boy shot his father during an argument over a fast-food order then turned the gun on himself - and both have died after nearly two days in the hospital.

Robert Lee Mueller Jr. and Robert Lee Mueller, 59, died late Tuesday after almost two days in critical care, the Houston Chronicle reported on its Web site Wednesday.

They had been hospitalized since Sunday, when the shootings took place at their home in an unincorporated area near Kemah, located 35 miles southeast of Houston.

According to the Galveston County Sheriff's Department, the argument took place after the teen returned from a fast food restaurant with food the father had not ordered. The father was shot once in the head. The boy shot himself after police arrived.

(Copyright 2008 by The Associated Press. All Rights Reserved.)