CAIRO (AP) — After Egypt’s worst sectarian violence in months left seven dead the past two days, Egypt’s leading opposition figure Mohamed ElBaradei on Monday called on the Islamist president to make serious concessions to bring the opposition into decision-making, saying national reconciliation is the only way out of the country’s myriad problems.

The violence, capped by an unprecedented mob attack on the main cathedral of Egypt’s Coptic Orthodox Church, raised new alarm over the escalating turmoil in the country, which has been polarized over the administration of Islamist President Mohammed Morsi and Islamists’ political power.