Indiana executed a man who admitted he killed his girlfriend's two children, the first of three executions scheduled across the U.S. on Thursday. 

Jeffrey Weisheit set fire to his girlfriend's house near Evansville, Indiana, in 2010, killing her two children, ages 8 and 5, CBS News reported. 

Florida and Alabama also have executions scheduled on Thursday. 

In Florida, Jess Guardado pleaded guilty to fatally stabbing a 75-year-old woman, who had helped him get a job and housing, inside her Walton County home in 2004. He stole a jewelry box and other valuables to support his drug habit. 

Guardado's execution will be the state's 19th execution this year, matching a record Florida set in 2025. 

Alabama is set to execute Michael Taylor, 54, who was convicted of beating to death an older couple with a metal bar during a robbery in their Gadsden home 35 years ago. 

It will be Alabama's third execution this year.