Chinese state media say residents are reporting increased crime in the southern city Dongguan, which has become a haven for thousands of people expelled from the nearby city of Shenzhen ahead of an international sporting event.

The Communist Party-controlled Global Times said Tuesday that more than 80,000 “high-risk” people have been expelled from Shenzhen in advance of the Summer Universiade, scheduled for August 12 to 23. It said many of them have moved to Dongguan, where they are being blamed for a rising number of robberies and rapes.

Global Times quoted a local newspaper, the Southern Metropolis Daily, saying the number of daily criminal incidents had risen from 20 to 30.

A senior security official in Shenzhen told Global Times that high-risk people are those who sleep during the day and go out at night without stable jobs, those who use fake identity cards to rent apartments and those who live on illegal incomes.

The official said the crackdown in Shenzhen also targeted mental patients who have committed offenses or pose a potential risk to the public.

Another newspaper, the Shenzhen Economic Daily, said police in the city had arrested more than 6,000 people in a sweep of rented houses, entertainment venues and Internet cafes, detaining 2,000 of them. It said about 800 drug users had been sent to rehab centers.