The fate of 100 children who had been detained in a Syrian prison is unknown more than two months after jihadists attacked the facility, United Nations experts said on Friday. International rights groups, including Save the Children and Human Rights Watch, have previously said 700 boys had been in the Kurdish-run jail in northeastern Hassakeh province before it was attacked by the Islamic State group. “We are extremely concerned that since the January 2022 attack, the fate and whereabouts of at least 100 of those boys remain unaccounted for, which raises serious concerns,” the UN human rights …