Prominent Youth Activist Detained in Egypt Egypt's prosecutor general ordered a prominent youth leader to be detained on Friday for four days pending an investigation into accusations he incited anti-government violence, a security official said, in the latest case of a pro-democracy activist being held over similar charges. Meanwhile President Mohammed Morsi's Muslim Brotherhood staged an anti-Israel rally, the first of its kind by the group since they rose to prominence in the wake of the 2011 uprising that ousted longtime autocrat Hosni Mubarak. The security official said Ahmed Maher, a leader of the April 6 Youth Movement that was at the forefront of the anti-Mubarak revolt, was arrested at Cairo's main airport as he arrived from the United States. He said Maher stands accused of "incitement" for actions at a demonstration in March against the country's interior minister, when protesters hurled underwear at the minister's house to oppose a police crackdown on the activist group. Maher is now being held on the premises of the prosecutor's office in the capital's Nasr City eastern district, the official said, after the four-day detention was ordered. Maher's April 6 group was one of Morsi's top allies during his presidential campaign last year, against a rival who was a Mubarak-era official the group feared would restore Mubarak's regime. Days before his arrest, Maher had expressed regret for the group's alliance with Morsi and his main backers, the Brotherhood. "Were we mistaken when we defended the Muslim Brotherhood at one point before the revolution and supported the Brotherhood candidate in the face of the military's and old regime's candidate," he wrote on the April 6 group's website. Now we are being treated as traitors and our image has been tarnished and we are sent to prisons by those we defended. A myriad of charges and complaints have been leveled in recent months against activists, journalists and TV personalities, including well-known satirist Bassem Youssef, for insulting Egypt's President Mohammed Morsi. Earlier this month, authorities arrested Ahmed Douma, a leading activist, and referred him to court for allegedly insulting the president in a TV interview. The crackdown comes at a time Morsi's government is struggling to meet its promises to carry out reforms and improve Egyptians' quality of life. Along with lawlessness and economic woes, the country has witnessed a surge in sectarian tension, with the country's Christian minority increasingly feeling the heat of newly empowered hardline Islamists. In the most recent example, security forces were put on alert on Friday and deployed riot police to a southern village for fear of sectarian violence after a Coptic Christian tailor was killed by unidentified assailants, a security official said. The officials spoke on condition of anonymity because they were not authorized to speak to the media. Back in Cairo, the Brotherhood organized its first anti-Israel rally since it emerged as Egypt's most powerful political force in the wake of the Arab Spring uprising. Emerging from weekly services at Al-Azhar mosque - the centuries-old seat of Sunni Muslim learning - demonstrators chanted "the people want the destruction of Israel" in protest of recent Israeli airstrikes in Syria and the detention of a Palestinian Muslim cleric.