Small insect/Beetle
 

I have a very small insect/beetle invading my garden, and having a lovel
time.
It is also coming inside the house, and is in the dogs coats.
It is small, and has vivid red & green band stripes across its body.
Can anyone help me to identify this pest (to say the least), and help me to
eradicate it.

JILLSIE.