At least 1.4 million girls in Afghanistan have been denied access to secondary education since the Taliban returned to power in 2021, UNESCO, the United Nations' cultural agency, said on August 15.
"In just three years, the de facto authorities have almost wiped out two decades of steady progress for education in Afghanistan, and the future of an entire generation is now in jeopardy," the agency said in a statement.
It comes as the Taliban marked three years since its forces seized Afghanistan's capital, Kabul, on August 15, 2021, after the U.S.-backed government collapsed and its leaders fled into exile.
Since the Taliban's return to power, women have been squeezed from public life -- banned from many jobs as well as parks and gyms -- and barred from secondary and higher education.
The restrictions amount to what the United Nations has described as "gender apartheid."
SEE ALSO: Afghan Taliban Created World's Most Serious Women's Rights Crisis, HRW SaysThere are now nearly 2.5 million girls deprived of their right to education, representing 80 percent of Afghan school-age girls, UNESCO said. This represents an increase of 300,000 since the previous count carried out by the UN agency in April 2023.
"As a result of bans imposed by the de facto authorities, at least 1.4 million girls have been deliberately denied access to secondary education since 2021," UNESCO said.
Access to primary education has also fallen sharply, with 1.1 million fewer girls and boys attending school, the agency added. It blamed the drop on the authorities' decision to ban female teachers from teaching boys as well as the lack of incentive for parents to send children to school.
The agency is "alarmed by the harmful consequences of this increasingly massive drop-out rate, which could lead to a rise in child labor and early marriage."
Enrolment in higher education is equally concerning, the statement said, adding that the number of university students had decreased by 53 percent since 2021.
SEE ALSO: The Push To Recognize 'Gender Apartheid' As A CrimeUNESCO Director-General Audrey Azoulay urged the international community to remain mobilized "to obtain the unconditional reopening of schools and universities to Afghan girls and women."
Lack of access to education has been among the main points of criticism by Afghans toward the Taliban authorities.
"There are those who are not literate enough, and more importantly, a part of society, women, are deprived of education, and this is a big problem for the people of Afghanistan," a male resident of the northern Balkh Province who preferred not to be named due to security concerns, told RFE/RL's Radio Azadi.
"The issues of education -- women's education and work -- and their participation at national and international level have been completely nullified and pushed to the sidelines," a female resident of Kabul, who also preferred not to be named, said.
The Taliban celebrates their return to power both in mid-August around the date Kabul fell and at the end of the month, when the last U.S.-led international troops left Afghanistan.
The withdrawal, agreed by the United States and the Taliban on February 29, 2020, allowed the radical Islamist movement's return to power 20 years after being ousted by U.S. forces following the September 11, 2001, terrorist attacks on the United States.
The Taliban government remains unrecognized by any other state.
WATCH: Rights groups have documented targeted killings, disappearances, and extrajudicial arrests of hundreds of former Afghan service personnel, while RFE/RL has spoken to two women who say they live in fear due to their past roles in the military.
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International aid organizations have warned that millions of Afghans struggle in "one of the world's largest and most complex humanitarian crises, three years after the change in power."
"Heavily dependent on humanitarian aid, Afghans are trapped in cycles of poverty, displacement, and despair," a statement by 10 aid groups -- including Save the Children, World Vision, Islamic Relief Worldwide, and the International Rescue Committee -- said on August 13.
SEE ALSO: Afghan Evacuees Remain In Limbo In Albania 3 Years After Taliban TakeoverWomen and girls are among the most seriously affected by this humanitarian crisis, Human Rights Watch has said. The Taliban has created "the world's most serious women's rights crisis," the organization said on August 11.