3.58pm BST

Thank you for all your comments today. Here is a roundup of the day's main developments:

Egypt

• The Muslim Brotherhood's supreme guide, Mohamed Badie, has been arrested by security forces. Badie, who has been charged with inciting the killing of of eight protesters outside the Brotherhood's Cairo headquarters in June, was found hiding in an apartment in the capital, state media reported. He has been taken to Torah prison in a suburb just south of Cairo and that a team of prosecutors are to question him today, security officials told AP. He is due to appear in court on 25 August.

• The Muslim Brotherhood said Badie was facing "political trumped up charges". It appointed Mahmoud Ezzat, described in the media as the Brotherhood's "iron man", as Badie's temporary replacement.

• An Egyptian court will review a petition for the release of deposed President Hosni Mubarak filed by his lawyer tomorrow raising the prospect of him being released within 24 hours, according to Reuters citing judicial sources. The sources said if the petition is upheld Mubarak will be released as there remain no further legal grounds for his detention, though he is being retried on charges of ordering the killing of protesters in the 2011 uprising. An online poster has been circulating on Facebook today supporting him for president in 2014.

• A state-owned newspaper has accused the Muslim Brotherhood of being being the attack in the Sinai that left 25 policemen dead yesterday. Al-Akhbar ran the headline "Brotherhood Massacre". The Guardian's Middle East editor said the headline and the arrest of Badie are part of a propaganda campaign intended to split the Brotherhood's supporters and to feed into popular sentiment against the Islamist group.

• Security officials say an Egyptian journalist working for a state-run daily has been shot dead by soldiers at a military checkpoint. They say Tamer Abdel-Raouf from al-Ahram newspaper and a colleague were on the road during a military-imposed nighttime curfew and a soldier opened fire after the pair drove off from the checkpoint without permission.

• Amnesty International said today that there has been "an unprecedented rise in sectarian violence across Egypt targeting Coptic Christians" since the violent dispersals of pro-Morsi sit-ins in Greater Cairo on 14 August and has demanded that the Egyptian authorities take immediate steps to ensure their safety. It says several Coptic Christians have been killed, their churches, homes and businesses targeted and graves desecrated, "seemingly in retaliation for their support of the ousting of Mohamed Morsi",

• A private lawsuit has been issued against the Nobel laureate Mohamed ElBaradai, who was until recently part of the interim government installed after the ousting of Mohamed Morsi. It charges him with "breaching national trust" (Arabic link). The charge is that by resigning as vice-president he gave the impression that the Egyptian authorities were using excessive force. He has been referred to trial on 17 September.