The family of Gaza journalist Mariam Dagga, who was killed in an Israeli airstrike on Monday, are mourning her death.

Dagga, a visual journalist who freelanced for The Associated Press, was among 22 people, including five journalists, killed when Israeli forces struck Nasser Hospital, according to health officials.

In his tent in Khan Younis, Riyad Dagga, her father, looks at the last photos taken by his 33-year-old daughter.

"I couldn't walk. And I didn't know what was around me when I heard the news, because it was a shock," he explained.

"The person who told me the news said that Mariam was martyred, and I collapsed," he said, and cried while watching a video of Mariam and him.

The Israeli military said it targeted what it believed was a Hamas surveillance camera, without providing evidence. Witnesses and health officials said the first strike killed a cameraman from the Reuters news agency doing a live television shot and a second person who was not named. A senior Hamas official denied that Hamas was operating a camera at the hospital.

Dagga, 33, and other journalists regularly based themselves at Nasser Hospital in Khan Younis during the war. She documented the experiences of ordinary Palestinians who had been displaced from their homes, and doctors who treated wounded or malnourished children.

The last photos taken by Mariam Dagga show the damaged stairwell outside a hospital in the Gaza Strip where she would be killed by an Israeli strike moments later.

"There were many people on the ground watching (the aftermath of) the first strike," said her sister Nada who was at the hospital when Mariam was killed. "Mariam, my sister, was on the stairs filming. I watched her and looked at her. The last look between me and her. She looked at me and smiled."

Her brother, who was also at the hospital, rushed to look for Mariam after the second strike.

"I found the martyrs on the ground, and the martyrs were above each other," he said. "I found (the body of) my sister, may God have mercy on her, above her colleagues’ (bodies) and her colleagues’ (bodies) were above each other."

A mother, daughter and beloved colleague among the journalists, Dagga is survived by her 13 year old son, Ghaith.

AP Video by Mohammad Jahjouh