Palestinian Authority-based news agency Maan reported Tuesday that Israeli military vehicles crossed into northern Gaza for surveillance activities on Monday.
The limited incursion took place in a border region near Beit Lahiya, witnesses told Maan.
Separately, Israeli warships opened fire at Palestinian "fishermen" off the coast near al-Sudaniyya west of Beit Lahiya.
No injuries were reported, but the fishermen fled and were unable to continue fishing, the outlet said.