Apart from Sinai, the Egyptian army said the operation would also cover parts of the Nile Delta and the Western Desert.
Russian Defense Minister Sergei Shoigu visited Cairo for talks with Egypt's political and military leadership on Wednesday
History teaches us that most wars break out in violation of a peace treaty.
"Anyone sponsoring terrorism will be punished no matter where they are," says Military spokesman; Egyptian air force cooperating with Libyan National Army.
Egypt's foreign ministry said it expressed dismay to the embassy because it could have negative effects especially on the economy.
After several years of uncertainty, Sisi sought to return Egypt to stability and a renewed role in the region.
Netanyahu, during a cabinet meeting earlier Sunday morning, pointed out that the last visit by an Egyptian foreign minister was in 2007.