This is the best summary I could come up with:

GAZA, Oct 17 (Reuters) - An Israeli air strike killed hundreds of people at a Gaza City hospital on Tuesday, health authorities in the Hamas-run enclave said, and the United Nations said an Israeli strike also hit one of its schools being used as a shelter.

A Gaza civil defence chief said on Al-Jazeera television that more than 300 people were killed at Al-Ahli al-Arabi Hospital.

A Gaza Health Ministry official said at least 500 people were killed and injured.

Earlier on Tuesday, the United Nations Palestinian refugee agency UNRWA said an Israeli air strike had killed at least six people after striking one of its schools that has been functioning as a shelter for displaced people.

Health authorities in Gaza say at least 3,000 people have been killed in Israel's intense 11-day bombardment since Hamas militants rampaged into Israeli towns on Oct 6, killing more than 1,300 soldiers and civilians.

A senior official for the internationally recognised Palestinian Authority, which operates in the West Bank but not in Gaza, described it as a massacre.

The original article contains 206 words, the summary contains 175 words. Saved 15%. I'm a bot and I'm open source!