Some 4,500 Palestinian prisoners send back food in protest

Around 4,500 security prisoners in Israel's jails sent back their food on Sunday morning, in a show of solidarity with Palestinian hunger strikers in Israel's jails.
Israel Prison Service spokesman Sivan Veitzman said the protest includes nearly all of the security prisoners in Israel's jails but that the IPS does not view the action as a hunger strike and that they expect that the protest will only last one day, at most three. 
She added that while the protest has not included violence on the part of any of the security prisoners, prison personnel are currently on a higher state of alert than usual.