 A new drug craze in the Democratic Republic of Congo's capital Kinshasa is fuelling fears, particularly over health impact and a rash of thefts of catalytic converters. In an abandoned shack in Congo's capital Kinshasa, people are mixing a new form of narcotic derived from a car engine. This is Bombay. It's made by mixing exhaust residue from a car's catalytic converter with pharmaceuticals like diazepam. Experts say it can cause users to stand motionless for hours or sleep for days. Cedric is a gang leader here. It makes them feel good and slows them down, he tells us, so they don't go stealing or causing problems. Before we knew that Bombay existed, we used to drink very strong whisky made by Indians. We were agitated when we started to hurt people. But with Bombay, it calms you down. You get tired. You stay somewhere standing up or sitting down for a very long time. When you're done, you go home without bothering anyone. But the authorities are less relaxed. In August police rounded up and paraded nearly 100 alleged dealers and users of Bombay, which means powerful in the Lingala language. They also displayed buckets full of the honeycomb exhaust filters that are crushed to make Bombay. Mechanics in the Congolese capital blame spiking demand for the drug for a rash of thefts. Chasori Kodogo says five to ten clients come to him every day, having had their catalytic converter stolen. Often when clients come to the shop, we check underneath the car and the catalyser is gone already. It's been cut off and the car will make a strange sound. Here in Kinshasa we don't sell catalysers for vehicles, so we have to order in Europe. It's expensive. This one is lucky. He still has his catalyser. Users mix the crushed ceramic honeycomb, which is coated in metals such as platinum, with pills or smoke it with tobacco. But Dandi Yelayulemba, country director for the World Federation Against Drugs, says nothing is known about the long term effects. There's substance made to be used in cars. So we have food, we have things to take for a wedding, we do not have to take substances from cars made for cars and start taking. He warned that the metals used in catalytic converters can cause cancer. The fear is, he said, that the consequences for a person's body will become apparent in the coming weeks and months. Hello. Hope you enjoyed the news. Please do subscribe to our YouTube channel and don't forget to hit the notification button so you get notified about fresh news updates.