Wigan Council is urging residents to be vigilant after needles were discovered this week at a local play area.
Nine syringes have been removed from the sand area at Norley Hall playground after a report from a local resident.
The needles were pointing up as if buried in the sand deliberately.
The playground remains closed following arson damage over the weekend and the council has condemned the behaviour.
Kathryn Rees, assistant director for transformation at the council, said: “We are absolutely appalled that somebody would deliberately do this at a children’s play area.
“We will not tolerate anti-social behaviour which poses a real threat to our communities and would urge any residents with concerns to speak to us.
“Although we believe it is an isolated incident in this area we would encourage people to be vigilant when visiting their local park and please report anything suspicious to the police.”
The council is monitoring the play area at Norley Hall.
There are a number of needle exchanges across the borough where needles should be disposed of safely.
If anyone does come across a needle in a public area it should be reported to the council and should not be picked up or touched.
If you are concerned about a potential needle injury you should seek medical advice immediately.
Report anti-social behaviour to the council online at www.wigan.gov.uk/reportit or via MyAccount.
Please report any suspicious activity to GMP on 101 or 999 in an emergency.