The Israeli military has opened a border crossing with the Gaza Strip for several hours to allow fuel deliveries to the territory.
The Nusseirat power plant depends on fuel deliveries from Israel
The move comes two days after parts of Gaza were plunged into darkness because of fuel shortages.
Gaza relies on Israeli fuel but Israel says it stopped regular deliveries for security reasons.
UN officials have warned unless Israel eases border restrictions, there could be a humanitarian disaster in Gaza.
The Israeli Army said the Nahal Oz border crossing with Gaza would be open for most of the day after the earlier security threat diminished.
The Palestinian electricity company has had to shut down three of the four generators running the area's main 140-megawatt power plant.
Palestinian officials have said up to 400,000 Gaza residents face the possibility of having no electricity.
Israel began cutting off fuel supplies to Gaza after the Islamist group Hamas took over the territory in June.