The UN Human Rights Office says Israeli attacks on and around hospitals have pushed Gaza's healthcare system to "the brink of total collapse" and raised serious concerns about war crimes and crimes against humanity.

A U.N. Human Rights Office report on Tuesday condemned Israeli attacks on hospitals in Gaza, saying they had devastated the Palestinian enclave's health system and raised serious concerns about Israel's compliance with international law.

A United Nations report published on Tuesday found that Israeli strikes on and near hospitals in the Gaza Strip had left healthcare in the Palestinian territory nearing total collapse.

Gaza's civil defence agency said an air strike hit a hospital Sunday, killing at least seven people, while Israel said it had targeted militants at the no longer functioning facility.

Israeli forces raided northern Gaza's last hospital and detained its director as a purported Hamas suspect. U.N. officials say he must be freed immediately.

John Spencer, an international expert on urban warfare, reveals Hamas's military exploitation of Gaza's healthcare system and the IDF's innovative response.