Seems Popo Bawa ("bat's wing" in Swahili), the sodomising demon of Zanzibar, has returned (and this time it isn't another Batman hoax):

Men in parts of Tanzania's main city, Dar es Salaam, are living in fear of a night-time sex attacker.

A BBC correspondent says the attacks are being blamed by some on a demon called "Popo Bawa" meaning winged bat.

Some men are staying awake or sleeping in groups outside their homes. Others are smearing themselves with pig's oil, believing this repels attacks.

Reports of the demon's existence have been common for many years in Zanzibar, where locals claim it originated.

The BBC's John Ngahyoma in Dar es Salaam says not many people actually believe that the demon exists and there have been no sightings.

But Mbaruku Ibrahim, who hails from Zanzibar, says the story of the demon is common there and people in his village on Pemba island sleep beside a huge fire outside their houses whenever it is said to appear.

The story goes that the bat is able to transform itself into a man at night and it has also been blamed for rapes of women.

Sheikh Yahya Hussein, a prominent astrologer in Tanzania, claims that the demon is a spirit that is unleashed by witches to torment their opponents.

Source

Considering "not many people actually believe that the demon exists" it has popped up quite often over the years:

• Fortean Times article from 1996
• BBC News report form 2001
• A 2002 travel guide

And this longer report from 2005 seems to contradict the idea that the belief isn;t storng and widespread:

Mohammed Juma starts to sweat and fidget as he recalls his rape by Popo Bawa, the most feared spirit-monster of the Zanzibar spice islands.

"We believe reading the Koran is our only defence, nothing else," says the 41-year-old driver and father of four. "But Popo Bawa is real, and well prepared."

Holidaymakers on the Indian Ocean islands tend to smile dismissively at accounts in guidebooks of the bat-like ogre said to prey on men, women and children. But for superstitious Zanzibaris a visit from the sodomising gremlin is no joke.

Although no one ever has seen it, belief in the monster and his unnatural lust is so strong that entire villages will sleep out of doors for protection: Popo Bawa (Swahili for Bat's Wing) prefers to attack behind closed doors at night.

In huts set amid rustling groves of jackfruit and mangoes on Zanzibar's Pemba island, victims told Reuters in interviews that they detected a bad smell, became cold and went into a trance in the moments before they felt the creature's inhuman strength.

Some attacks were heralded by the sound of giant wings and claws rattling and scraping on huts' tin roofs. Others cringed in terror at what sounded like a car engine ticking over.

...

"I couldn't call out for help to my husband who was lying asleep beside me. Popo Bawa is strong: He really presses down on you. And it took such a long time: One hour! Eventually I lost consciousness. And I was one of many who were attacked."

...

Many on the islands are adept at exorcisms, placing charms at the base of fig trees or sacrificing goats to avert evil or draw favour from the spirit world.

So experienced are the isles' traditional healers that they draw visitors from the Gulf and east Africa, with the successful amassing riches and prestige.

But no placatory offering or witch doctor can deflect Popo Bawa when he has made his mind up to strike, islanders say.

The monster favours Pemba, the poorer and more backward of the archipelago's twin islands despite being home to the clove plantations that provide the mainstay of Zanzibar's economy.

He also becomes active at election time: a habit that is testing nerves ahead of polls due in October.

His last major visitation was during elections in 1995, when Juma says he endured his terrifying ordeal, although some reported his presence again in 2000 and in 2001.

...

But Juma says Popo Bawa is apolitical even though electoral emotions seem to summon him from the beyond. "He can strike even if the opposition wins the elections," he said.

The driver vows to do his utmost to avoid what happened to him back in 1995 as he sat alone late one evening.

"Many were afraid and were sleeping outside. But I was confident and was alone in my room. I was reading the Koran for protection. After about 20 minutes I started feeling sleepy. I heard something falling on the roof. I continued reciting. I started feeling something in the room.

"I felt my mouth becoming bigger and bigger. I started losing my ability to form words. My feeling was that my lower lip had stretched to my lap. I felt weak in my body. I became very sweaty. My experience was like that of a neighbour of mine who said his head seemed to grow to an enormous size."

Popo Bawa gets annoyed if villagers deny his existence -- a fact to which Khamis Juma Hamad says he can testify.

Hamad, a retired village chief now aged 75, said that in 1971 Popo Bawa spoke to terrified villagers on Pemba through a girl possessed by the monster.

"I am Popo Bawa," said the girl, called Fatuma, speaking in the unnaturally deep voice of a man. "You have challenged my existence so I have come to prove I am here."

Seconds later, he says, the villagers heard the sound of a car revving and a rustle on a nearby roof -- signs of Popo Bawa. "The people felt cold, almost paralysed. They were terrified."

The longer description certainly makes one think it might be a contagious form of sleep paralysis and if so it would be a fascinating thing to study. It is also interesting to see a link between political tensions as it was one factor I noted behind an increase in tension leading to an outbreak of the Green Underpant Monster (see my article in the Fortean Times a year or so back).