Egyptian and Libyan warplanes reportedly launched more airstrikes against Islamic militants who murdered 29 Egyptian Christians last week.
Witnesses say Monday's attacks targeted the Libyan city of Derna, where Egypt says the militants have camps.
Egyptian military officials have not confirmed Monday's attack. But a Libyan spokesman said two groups affiliated with al-Qaida were the targets.
Egypt's air force began attacking the camps Friday, just hours after militants rounded up Christians in the Egyptian province of Minya and opened fire, killing 29 and wounding 24.
A governing Libyan faction in the east allied with Egypt, is taking part in the airstrikes.
Russian Foreign Minister Sergei Lavrov was in Cairo Monday, saying Moscow will back any initiative that will genuinely help in the fight against terrorism.
He met with Egyptian Foreign Minister Sameh Shoukry who said Cairo is closely coordinating with Russia in the fight, including stopping the terror financing and preventing countries from giving a safe haven to extremists.
