Egypt closed the Rafah border crossing into the Hamas controlled Gaza Strip on Saturday, Palestinian news agency reported.
"Egypt is concerned about the security of Palestinian citizens as Rafah and Sheikh Zuweid continue to blaze with explosions occurring from time to time," an Egyptian security official told Ma'an.
Egyptian officials have accused Hamas of aiding the Muslim Brotherhood in Sinai - an allegation the Palestinian group denies - and say restrictions at Rafah were linked to the security situation in the peninsula.
In addition to the clampdown at Rafah, Egypt has been waging a campaign to destroy the network of smuggling tunnels that delivered weapons and goods to the Gaza Strip, which is partially blockaded by Israel.
Reuters contributed to this report.