Assailants threw a hand grenade into a school in Benghazi . A hospital said the attack happened during school break time . Violence are not uncommon in the eastern Libyan city , but school attacks are rare . Blasts and assassinations are not uncommon in Benghazi , the cradle of Libya 's 2011 uprising and where U.S . Libyan authorities are struggling to maintain order in a country awash with violence .
Assailants threw a hand grenade into a school in Benghazi . A hospital said the attack happened during school break time . Violence are not uncommon in the eastern Libyan city , but school attacks are rare . Libyan authorities are struggling to maintain order in a country awash with violence .