IDF closes sites, reinforces troops near Gaza border, out of concern for violence, escalation.

On Wednesday, Palestinian Authority and Gaza Arabs will celebrate "Nakba Day."

Recently PA and Gaza Arabs have threatened Israeli citizens several times, warning of incidents on Nakba Day - May 15, the day after Israeli Independence Day on the Gregorian calendar.

In response, the IDF completed its preparations around Gaza, out of concern that despite the Qatari funding, there will be a security incidents.

Two memorial sites - Hetz Shachor and Yantzu - will be closed.

Israeli security forces believe violence will erupt on Wednesday afternoon, and have issued reminders and warnings to stay away from incendiary and explosive balloons, not to touch them, and to call the police or local security officer.

Reinforcements have been placed along the border with Gaza, and special units have been sent there as well out of concern that escalation and destabilization will occur quickly. Some IDF units have remained in their Gaza-area bases but on high alert.

On Monday, United Nations Special Coordinator for the Middle East Peace Process Nickolay Mladenov warned of the risk of fresh conflict.

"The risk of war remains imminent and today we have perhaps the last chance to consolidate the agreements that have been reached," he told a press conference in Gaza. "The next escalation is going to be probably the last."