The sister of Hamas senior official Moussa Abu Marzouk is being treated in an Israeli hospital for cancer, Israel Radio reported Monday.

The hospitalization of the sister of Abu Marzouk is the latest case of a relative of a member of the terror group being treated in Israel despite a toxic relationship with the Jewish state.

There are few details known about the case, including which hospital is treating the woman.

The 60-year-old woman, who was not named in the report or by medical officials, suffers from advanced-stage cancer. Her condition is critical, and she remains hospitalized in Israel, according to the report.

Marzouk is one of Hamas’s top officials, and has served as its main Gaza spokesman in recent years.

The incident marks the latest in a series of medical treatments Israel has offered to the families of Hamas leaders. Israel and Hamas fought a fierce 50-day war this summer that killed more than 2,100 Palestinians, mostly civilians according to Palestinian sources, and 72 people on the Israeli side, mostly soldiers. Israel says half of the Gaza dead were Hamas and other gunmen.

Despite the ongoing state of war between Israel and Hamas, Israel has allowed Palestinians to enter Israel for medical treatments not available in Gaza.

This policy has meant that the family members of Hamas leaders often receive medical treatments in the Jewish state. Hamas leader Ismail Haniyeh has seen his mother-in-law, daughter and granddaughter all treated in Israeli hospitals.

In this Wednesday, Aug. 27, 2014 file photo, Palestinian top Hamas leader in Gaza, Ismail Haniyeh, gives a speech during a rally in Gaza City. (Photo credit: AP/Khalil Hamra, File)

In this Wednesday, Aug. 27, 2014 file photo, Palestinian top Hamas leader in Gaza, Ismail Haniyeh, gives a speech during a rally in Gaza City. (Photo credit: AP/Khalil Hamra, File)

Last month, Haniyeh’s daughter was hospitalized at Tel Aviv’s Ichilov Hospital for “a number of days,” according to a hospital spokesman. The hospital did not disclose her medical condition, but Reuters reported the treatment followed complications during a standard medical procedure the woman had undergone in Gaza.

In June, Haniyeh’s 68-year-old mother-in-law was treated in Augusta Victoria Hospital, near Jerusalem’s Mount of Olives.

And in November 2013, Haniyeh’s one-year-old granddaughter received treatment in Israel for an infection in her digestive tract. She was evacuated to an Israeli hospital in critical condition, but was returned to her family in Gaza after her condition was deemed incurable, an Israeli military spokesman said. The girl later died of her condition.

Ahmed Yousef, a senior Hamas official in Gaza, said at the time that Haniyeh was left with little choice. He said the girl’s case was life-threatening, and with Gaza’s borders virtually sealed by Israel and Egypt, there was no other place to go.

“If you are on the verge of death, and your enemy is the only one to treat you, of course you will resort to him,” he said. “Children of Hamas leaders are human beings.”

Marissa Newman and AP contributed to this report.