Two death row inmates, one in Alabama and the other in Georgia, faced execution Thursday despite multiple appeals.
Michael Eggers, a 50-year-old who was sentenced to death for the kidnap and murder of his wife in 2000, was scheduled to receive a lethal injection at 6:00 pm (0000 GMT Friday) in Alabama.
His defence team, which sought to stay the execution at the US Supreme Court, says he suffered from hallucinations, a persecution complex and other serious psychological ailments.
In January, the court granted a stay of execution previously to another Alabama death row inmate, 67-year-old Vernon Madison, because he was suffering from dementia.
In Georgia, meanwhile, Carlton Gary, 67, is awaiting execution at 7:00 pm (0000 GMT Friday) for killing three women in 1977.
The state of Georgia has denied appeals for clemency, but his lawyers also are petitioning the Supreme Court for a stay of execution.
Prosecutors say Gary is responsible for a string of murders of elderly women from September 1977 to April 1978, in Columbus, Georgia.
Aged 59 to 89, the women had been severely beaten, raped and strangled, often with their own tights. Seven women were killed and two were hurt.
Nicknamed the “stocking strangler,” Gary was arrested in 1984 and convicted of three of the murders.
His lawyers insist, however, that new scientific methods would prove their client was innocent.