Egyptians from across the political spectrum are mourning the death of a young activist, Zeinab El-Mahdy, who committed suicide on Thursday.

El-Mahdy hung herself at her home in Cairo on Thursday afternoon after leaving a suicide note to her family.

Born in 1992, El-Mahdy, a graduate of Al-Azhar University, was an ex-member of the Muslim Brotherhood. She left the group shortly after the revolution in 2011, alongside Abdel-Moneim Abul-Fotouh.

Mohamed El-Kassass, a former Brotherhood youth member who defected with El-Mahdy, expressed his shock at her death.

"Zeinab was a member of the Egyptian Current known for her positions against the Brotherhood and in support of the January 25 revolution. But she chose solitude away from her friends lately after becoming depressed about the current political situation and the revolution's setback," El-Kassass, now a member of the Islamist-leaning Strong Egypt Party, told Al-Ahram Arabic news website.

The Egyptian Current was founded by a group of ex-Brotherhood youth and merged in 2014 with the Strong Egypt party founded by Abdel-Moneim Abul-Fotouh.

During the 2012 presidential election, El-Mahdy joined Abul-Fotouh's campaign team, before criticising him and leaving his party. 

El-Mahdy was mourned and remembered warmly by activists from across the political spectrum, a rare thing in Egypt's highly polarised political climate.

Friends of El-Mahdy said she had suffered from extreme depression for several months and had closed all her social media accounts.

Ammar Metawaa, a friend of El-Mahdy from the Muslim Brotherhood Youth, said she developed depression while working on issues related to detained female supporters of ousted president Mohamed Morsi.

Thousands of Morsi supporters have been detained in a widespread crackdown since the Islamist president was ousted from power in July 2013.

She told me that she was tired and exhausted, that there was no way to secure the rights of the detainees, Metawaa wrote on Facebook.

Metawaa said he had not thought she was serious when she mentioned suicide.

Ahmed Emam, official spokesperson for the Strong Egypt Party, declined to comment on El-Mahdy's suicide, but said her death highlighted the frustration many young activists feel with the current political situation.

The same sentiment was shared by Khaled Dawood, a leading member in liberal Constitution party.

"I did not know Zeinab El-Mahdy personally or what she went through, but her suicide was like a slap that reminds us how things ended for a young lady who hoped the January 25 revolution would open the door for better life and more justice," he wrote on Facebook.

Many young activists have shared her picture on Facebook and Twitter. Many show her smiling. They all remember her as a human rights campaigner who opposed both Morsi and the current government.

Her funeral was held on Friday. It was attended by many of her friends and young activists. She was buried in her family tomb.