Four people were killed and fiveinjured when their pick-up van overturned in Chhattisgarh's Bastar district on Monday, police said.The mishap occurred at around 12:30 pm near Raikot village under Kodenar police station limits when over a dozen people from Mandwa were going to Tokapal to attend a local market, an official said."The driver lost control of the van and it overturned, leaving three women dead on the spot. Of the six injured, one succumbed in a nearby hospital. A case has been registered," he added.