Yes they are. They are used to serve warrants. Far too casually used.

They are so casually used, that they go to wrong addresses and attack innocent people in their homes...tossing flash-bang grenades into baby cribs (actually happened) and killing innocent people. Their use is so mundane/boring/tedious, that they can't even be bothered to double and triple check the address they are going to. But, the police are immune from prosecution for such mistakes.

Don't worry, though. It will continue to happen, because those deaths of innocents fuel the political divide.