Why we have “$\Delta \Gamma = \delta$”, in $\mathbb{R}^{n}$, where $\Gamma$ is fundamental solution and $\delta$ is the dirac measure?

Question

Why we have "$\Delta \Gamma = \delta$", in $\mathbb{R}^{n}$, where $\Gamma$ is fundamental solution and $\delta$ is the dirac measure?