First Thing: Hamas prepares for long war as Israel says there is ‘nowhere to hide’

Israeli military says air force carrying out strikes on Gaza every four hours. Plus Minnesota man's 2,749lb pumpkin sets world record

Good morning.

The Israeli military has said Hamas operatives have nowhere to hide" in Gaza and that its air force is carrying out intense strikes in waves every four hours.

Were any US citizens killed in the Hamas attack? At least 11 US citizens were among those killed in the Hamas onslaught on Israel at the weekend, Joe Biden said on Monday, as the death toll in Israel rose above 800. The president also said US officials believed it likely that American citizens were among those being held hostage by Hamas.

Are civilians in danger in Gaza? The UN human rights chief, Volker Turk, said Israeli air operations had struck residential buildings, including tower blocks, as well as schools and UN buildings, resulting in civilian casualties. International humanitarian law is clear: the obligation to take constant care to spare the civilian population and civilian objects remains applicable throughout the attacks," he added.

Is Mansur's story unique? No, he is one of dozens of current and former workers who claim they were tricked and exploited by recruiting agencies in Nepal and labor supply firms in Saudi Arabia and then suffered under harsh conditions at Amazon's warehouses.

What has the Guardian uncovered? Forty-eight of the 54 Nepali workers interviewed for the article say recruiters misled them about the terms of their employment, falsely promising they would work directly for Amazon.