Egyptian officials say militants shot dead at least four security personnel in separate attacks Sunday in Egypt's northern Sinai Peninsula.
Security sources say gunmen fired at a police station, a police club and an army checkpoint in Arish city. The attacks wounded several civilians.
The pace of attacks on security forces in the northern Sinai by Islamists loyal to former Egyptian President Mohamed Morsi has intensified since the army ousted him from power more than two weeks ago. About 20 people have died in the attacks, including soldiers and civilians.
The northern Sinai has been a lawless part of Egypt since Morsi's predecessor, Hosni Mubarak, was toppled from power in a military supported popular revolution two years ago.
In other news, a panel of experts rewriting controversial parts of Egypt's Islamist drafted constitution met for the first time Sunday. The 10 judges and law professors will have one month to propose constitutional amendments as part of a timetable for returning Egypt to democratic rule.
Many secular and liberal Egyptians opposed the previous constitution, which was hastily approved by a drafting committee dominated by Islamists, because they said the charter left out basic clauses to protect civil rights and social justice.
Egypt's interim government has said it intends to hold new parliamentary and presidential elections under a revised constitution early next year.
Morsi had served only one year of his term as Egypt's first democratically elected president following the removal of Mubarak in 2011.