The mother of a Palestinian prisoner died on Monday while traveling with a group from Gaza to visit relatives in Israeli jails, a prisoners group said. Aisha Isleih died as the bus was preparing to leave for Israel, director of the Gaza-based prisoners group ‘Waed’ Saber Abu Karsh told Palestinian (Ma’an) news agency. The cause of death is still being determined. Isleih was part of a group of 37 people who were heading to Israel to visit jailed relatives, in the fourth such visit of its kind since 2007. Isleih had not seen her son since he was detained five years ago on a twelve year sentence.