Israeli forces killed at least eight people in attacks on police stations and another location in the southern Gaza Strip on Sunday.
Air strikes targeted two police checkpoints in al-Mawasi area of Khan Younis, according to local media.
Such police checkpoints had been established across Gaza to help protect displaced families.
Displaced people, including a girl, and three police officers were among those killed, the Palestinian health ministry said. An additional four people were wounded.
There were also reports of Israeli naval fire off the coast of Khan Younis, threatening fishermen and displaced people. No casualties were reported.