A health ministry spokesman said a warplane belonging to the self-styled Libyan National Army carried out the attack on Saturday. He said seven people were also wounded. The LNA led by Khalifa Haftar has made no comment.
The latest fighting pits the government of national accord (GNA) in Tripoli against the self-styled Libyan National Army (LNA), under Khalifa Haftar, which rules by fear in the east and south.
Sisi previously announced that Egypt will intervene militarily in Libya if the troops of the Government of National Accord attack the cities under the control of the Libyan National Army.
Fighting broke out near the palace on Sunday morning, with several sources saying an elite national army unit led by a former French legionnaire was behind the unrest.
Haftar has led the militia known as the Libyan National Army in an offensive against the United Nations-recognized Government of National Accord headed by Prime Minister Fayez Sarraj.