(CNN)[Breaking news update, published at 11:49 p.m. ET]
Arkansas has executed Marcel Wayne Williams, the state's attorney general confirmed, making him the second man to be put to death Monday night -- in Arkansas' first double execution since 1999. Williams was found guilty of murdering Stacy Errickson in 1994.
[Original story, published at 11:39 p.m. ET]
Arkansas executed Jack Harold Jones on Monday night in the first of two executions scheduled for that evening.
Jones was sentenced to death for the 1995 rape and murder of Mary Phillips.
"The Phillips family has waited far too long to see justice carried out, and I pray they find peace tonight," Arkansas Attorney General Leslie Rutledge said after the execution.
Marcel Williams was scheduled to follow Jones. The two were among eight inmates Gov. Asa Hutchinson set for execution in April before the state's supply of sedatives used in lethal injection expires at the end of the month.
Arkansas executes 2 men in one night - CNN.com