A statue of the Virgin Mary in some church in the Sacramento area is crying tears of blood.
Can I just say something before we all get carried away?
When I take a shower in my bathroom, and forget to turn on the fan or open a window, the walls (which are painted yellow), "bleed" red. Not a lot, just a little. This is not a cosmic message. This is the product of paint and condensation.
And this is being generous. There are, quite likely, other reasonable explanations.