A still image from footage released by the Israel Defense Forces purports to show the moment an air strike was abandoned over Gaza to spare civilian lives
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Close-up: Air strike warning footage

As the Palestinian civilian death toll grows, the BBC examines the methods employed the Israel Defense Forces to minimise civilian casualties.

Israel has urged thousands of people in east and north Gaza to leave their homes as it continues air strikes, which it says are aimed at stopping Hamas rocket attacks.

Palestinian officials say at least 211 people have died in Israeli raids, including 10 killed overnight and four children who died later on Wednesday.

Israel says it is trying to minimise civilian casualties by issuing a variety of warnings - but how effective are they?

The BBC examines footage from both sides.