The Hamas-controlled administration in Gaza has announced that three prisoners have been executed.
The Gaza interior ministry says the men were hanged at what it called a security centre in Gaza City.
One of the men was accused of collaborating with Israel and the others had been found guilty of murder.
The man executed for collaborating with Israel is the first to be hanged for the offence since two similar executions last July.
Under Palestinian law, executions are meant to be approved by the Palestinian president.
But since the split between Hamas-controlled Gaza and the Palestinian-Authority-run West Bank, Hamas does not recognise the authority of President Mahmoud Abbas.