According to statistics released by Israeli rights group B'Tselem earlier this month, 291 Palestinian minors were held in Israeli prisons as security detainees and prisoners.
"Ahed Tamimi has been released, but only after serving an unjust sentence based on the ridiculous premise that she posed a threat to armed and heavily protected soldiers," Saleh Higazi, Amnesty International's head of office in Jerusalem, said.
"Ahed Tamimi's release must not obscure the familiar and continuing story of the Israeli military using discriminatory policies to lock up Palestinian children," said Higazi , who described her arrest as "a blatant attempt by the Israeli authorities to intimidate those who dare to challenge the ongoing brutal repression by occupying forces."
Israeli authorities last month denied a petition for Tamimi's early release.
The eight-month sentence was part of a plea deal. But some Israeli MPs said that the 17-year-old's punishment should have been much harsher - the deputy speaker of the Israeli Knesset, Bezalel Smotrich, wrote on Twitter in April that Tamimi "should have gotten a bullet, at least in the kneecap."
Some Israeli media have referred to her as the "soldier slapper" or nicknamed her "Shirley Temper" due to her wild locks of blonde hair.
Tamimi's village of Nabi Saleh, about 20km northwest of the Palestinian administrative capital of Ramallah, has seen weekly protests against Israel's occupation since 2009.
It was then that Jewish settlers had confiscated part of the village's land, including its spring, for the alleged expansion of a nearby settlement, rights groups say.
Israeli troops and border police are stationed there to prevent the protests from reaching the Halamish settlement, which is a kilometre south of Nabi Saleh.
