A stash of spice wraps and a blade were found during a search of Doncaster town centre.
Officers found a black bag containing 36 individual wraps of spice during a search of Market Place earlier this week.
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A blade was also found nearby.
Police chiefs in the town have issued a series of warnings to kind-hearted residents in the town not to give money to street beggars.
They claim that some of that cash is used to buy drugs, which triggers dealing.
Officers want cash to be given to charities which can help and support those living on the streets.
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Yesterday morning, a man claiming to be homeless was arrested carrying a number of individual drug wraps ready to sell on the streets.
PC Jack Goodall, from the Doncaster Central neighbourhood policing team, said: "Please be aware that money given to some beggars in the town centre may be used to purchase drugs such as spice.
"This in turn will encourage drug dealing, which is likely to be the reason 36 wraps were discarded following the presence of officers the town centre.
"If you would like to support people who are homeless, please do this by giving to the relevant charities who are able to use the money appropriately to provide support services.
"Many of the beggars in our town centre have access to housing and food provisions."