Complex sentence: An anonymous "security source" claimed that little resistance was encountered because the local populations have become accustomed in recent years to regular night raids by the IDF, though rubber-coated bullets and tear-gas canisters were heard.
Split into simpler sentences: An anonymous "security source" claimed that little resistance was encountered because the local populations have become accustomed in recent years to regular night raids by the IDF. The sound of rubber-coated bullets and tear-gas canisters were heard.