A young Egyptian man protested Thursday in Cairo's Tahrir Square against the regime of President Abdel Fattah al-Sisi after a horrific train accident in the capital in a scene that appeared rare.

Pictures and videos circulating through social networking sites showed a young man standing alone in the field, waving a sign reading "Go away, Sisi."

In a separate section, the protester, a pharmacist named Ahmed Mohi, spoke of the intention of others to participate in the demonstration, saying that "today will be a historic day for the people of Egypt."

Later, the young man, accompanied by another, appeared inside a police car after being arrested from the field, according to another video clip in which the young man said that "inside a police car takes him to an unknown place."

In response to the incident, the Egyptian Center for Economic and Social Rights (independent) said in a statement via Facebook that "the security forces arrested a young man named Ahmed Mohi, carrying a banner opposing the regime, from the heart of Tahrir square."

The statement pointed out that a lawyer at the center will go to the police stations surrounding Tahrir Square to ask about the young man.

The Egyptian authorities were not immediately available for comment on the human rights center and several accounts on the communications platforms.

Tahrir Square is a symbol of the revolution of 25 January 2011, which forced former President Hosni Mubarak to step down on February 11 of the same year, after nearly 30 years in office.

However, due to legal restrictions on demonstrations, demonstrations by opponents are rare.

On Wednesday, a shocking train accident at Cairo's main station killed 22 people and injured others, and different segments of the group expressed deep grief across the platforms.