Do the Maasai have vampire stories?

Vampire stories of one kind or another appear in many cultures. Does anyone know if the Maasai (a pastoral people of eastern Africa) have vampire stories? I’m curious, because the Maasai often drink the blood of their cows. They will open a vein and take some blood without killing the animal. I’m wondering if this gives them a different take on vampires. Maybe a creature that drinks blood would not seem all that scary to them, or on the other hand, maybe a monster that treats them the way they treat their cattle might seem even more horrible. Information about vampire stories in other cultures that drink blood is also welcome.