A man who held hostage young students of Amish village school, killing five girls, said he had molested two young relatives twenty years ago.

Shortly before opening fire a gunman, who has been identified as Charles Carl Roberts IV, a local milk truck driver, confessed to his wife that he was having "dreams of molesting again," authorities said Tuesday.

Police admits the gunman may have planned to molest the girls at the Amish school. However, State Police Commissioner Jeffrey B. Miller said there's no evidence he was planning to attack a specific school in very religious traditional Amish community in West Nickel Mines.

Roberts opened fire in the one-room schoolhouse killing three girls and wounding seven before killing himself. A fourth girl died of wounds today.

"He states in his suicide note that he had dreams about doing what he did 20 years ago again," Comm. Miller said. Roberts also expressed anguish over the loss of the couple's newborn daughter, Elise, in 1997, Miller said.

Roberts left one note for his wife, one for each of his three children and a note and checklist in his truck, authorities disclosed.

He said Roberts had sexual lubricant and flex-ties with him when he took the students hostage, and that he chained the girls together in a line at the blackboard after sending the boys and adults away.

Roberts also had the weapons and supplies for a long stand-off, he said.

It was the third and deadliest school attack in the US in less than a week. The attack was similar to school siege in Colorado when one girl was killed.

In Montreal, a shooter obsessed with death and violence, opened fire only two weeks ago, wounding 20 and killing one female student.