ST. LOUIS — A Georgia inmate convicted of rape and murder has been put to death in the nation’s first capital punishment since a botched execution in April raised new concerns about lethal injection.

Marcus Wellons, 59, was executed late Tuesday night at a prison in Jackson after last-minute appeals to the U.S. Supreme Court were denied. Wellons’ execution came about an hour before that of inmate John Winfield, who was convicted of killing two women, early Wednesday in Bonne Terre, Missouri.

Neither execution had any noticeable complications. Another execution, the third in a 24-hour span, is scheduled for Wednesday night in Florida.

Nine executions nationwide have been stayed or postponed since late April, when Oklahoma prison officials halted the execution of Clayton Lockett after noting that the lethal injection drugs weren’t being administered into his vein properly. Lockett’s punishment was halted and he died of a heart attack several minutes later.

“I think after Clayton Lockett’s execution everyone is going to be watching very closely,” Fordham University School of Law professor Deborah Denno, a death penalty expert, said of this week’s executions. “The scrutiny is going to be even closer.”