DUBLIN — A Dublin jury found two 14-year-old boys guilty on Tuesday in the killing of a teenage girl last year, the youngest people ever to be convicted of murder in Ireland.

In a case that has shocked and horrified the nation, the two boys, who were both 13 at the time of the killing, were found to have murdered Ana Kriegel, 14, whom they had lured to an abandoned house on the outskirts of the town of Lucan, a Dublin suburb.

Her naked body was found in the house three days after she had been reported missing, with over 50 separate injuries. A state pathologist testified that there was evidence of compression of her neck, but that the likely cause of death was blunt trauma to her head and neck, possibly from blows from a bloodied stick and concrete blocks found near her body.

One teenager, known as “Boy A” because of legal restrictions on reporting identities in underage cases, was convicted of murder and aggravated sexual assault after the police found his semen on clothes torn from the girl’s body. The victim’s blood was also found on his shoes and on items from what the police called a “murder kit” — kneepads, gloves, shin-pads, a scarf and a homemade horror mask found in a backpack in Boy A’s home.