Egyptian military helicopters carried out air raids on Sunday in the Sinai Peninsula, in the second day of the military's counter-terror offensive there.
Apache helicopters reportedly hit targets in northern Sinai near the Rafah border crossing with Hamas-ruled Gaza, witnesses said.
Egypt closed the Rafah crossing on Saturday, citing "security concerns" following a crackdown on Sinai terrorists, reported the Bethlehem-based Ma’an news agency.
The Palestinian Authority’s crossings director, Maher Abu Sabha, told Ma'an that the crossing would be closed indefinitely following unrest in the Sinai peninsula.
At least 10 Islamist terrorists were killed as Egypt's army launched an air and ground assault on terrorists in the restive Sinai Peninsula on Saturday, security officials said.
Twenty others were wounded and 15 arrested, according to the officials.
Deadly violence has grown in the Sinai since former president Hosni Mubarak was toppled in massive popular protests in 2011.
Clashes between terrorists and security forces have increased since the military toppled Islamist president Mohamed Morsi on July 3.
Meanwhile, a top Egyptian military commander said his forces have seized at least 10 shoulder-launched anti-aircraft missiles (SAM) during the offensive against Islamic militant hideouts.
Stockpiles of SAM missiles reportedly went missing from Libya following the overthrow of Muammar Gaddafi. It has long been suspected that at least some of them - along with other weapons - had been smuggled into the lawless Sinai Desert - although the source of this particular haul has not yet been identified.