Why did the Palestinian group Hamas launch an attack on Israel? All to know

EXPLAINER

Dozens killed, hundreds injured after Hamas sends rockets, fighters in to Israel, which has started bombing Gaza.

Israel and Hamas seem to be on the brink of another conflict after a surprise attack on Saturday involving aerial, sea and ground operations, initiated by the Palestinian group from the Gaza Strip. Israel responded with a heavy bombardment of the blockaded coastal enclave.

Here is what to know:

What happened and when?

• The Palestinian armed group Hamas has launched…