Health officials say that wrong information about a cholera outbreak in northern Mozambique has caused people to riot and some have died. The WHO said that false information about the disease has caused problems. We checked out some protests on social media and local news to see what caused the problems. Recently, a man was killed by a group of people in Gurue town in Zambezia province. The people wrongly thought he was spreading cholera. This was reported by health officials. A video seen by the BBC and shared on social media shows a large crowd watching a man's body. In another protest, four people died when police fought a group attacking homes and property belonging to local officials in Nacala Porto in Nampula province. In Cabo Delgado province, police shot into the air to break up a group of people trying to attack a health centre in Meluco district. What do people think is true. We don't know for sure what is causing the misinformation to spread, but we have some ideas from watching social media. Cholera grows where there is not enough clean water and good sanitation. Some people are saying online that things like adding chlorine to water and using purifiers are making the disease spread, but that is not true. The BBC reporter in Maputo says most violent cases of cholera are caused by wrong information. Also, they are going after the leaders who encourage people to use the purifiers. He says people wrongly think the leaders are part of the group that is spreading the water-borne disease. In a message with the video of the killing in Garue, it was said that the victim had given out harmful "dust" at a place in the neighborhood. The person from WHO in Africa in Mozambique, Severin von Xylander, says wrong information is bad because it can make people do things that spread disease. Mozambique has been fighting a disease outbreak since September of last year. It's just one of several countries in the area dealing with more cases of cholera. Other countries include South Africa, Malawi, Zimbabwe, DR Congo and Kenya. "This makes people not trust the health experts, which makes it harder for them to respond to public health problems and makes outbreaks last longer. " Graph showing 30,943 people have cholera and 135 have died.