Twenty-four US states allow people who were under 18 when they committed a crime to be executed.
In 1993 alone, four people who were 17 when they committed their crime were executed, two of them by Texas (a state famous throughout the civilized world for its brutality). Since 1985, the US has executed 9 juveniles. Since 1990, only 6 countries have executed juveniles - Iran, Saudi Arabia, Pakistan, Yemen, Nigeria, and the United States. The US has executed 6 juvenile offenders since 1990 - more than any other country.
The US is in clear breach of the International Convenant on Civil and Political Rights, ratified by the US in 1992, and other international human rights treaties. It is also in breach of the UN Convention on the Rights of the Child - although along with Somalia, it is one of only two countries that have failed to ratify that treaty.
11 US states have no minimum age limit for executions, although in practice the minimum age is 16. In 1996, Mississippi prosecutors sought the death penalty for offenders aged just 13.
There are a large number of people on death row in the US for crimes committed when they were under 18 - in May 1998, the total was more than 70, with more than 25 of them in Texas alone. In Alabama, three people are on death row for crimes they committed when they were 16, and several more for crimes they committed at age 17. Juvenile offenders constituted 2% of the death row population. All of them were male, two-thirds were from ethnic minorities, and two-thirds of their victims were white. The number of juveniles on death row today is double what it was in 1983.