Emergency services have been attacked a number of times whilst attending fires in a Batley park.
Police say a dozen blazes have been started at Wilton Park over the last few days and when fire crews have attended they have had stones and tarmac thrown at them.
Officers from West Yorkshire Police in Batley and Spen said it "put an unnecessary drain on emergency resources, and takes units away from potentially life-threatening jobs".

Controversial 500MW Solar Farm Spanning Milton Keynes and Northamptonshire Approved Despite Environmental Concerns
Nine People Charged with 49 Offences Following Major Police Raids in Rochdale
Calderdale Youth Justice Service Praised for Supporting Young People Despite Inspection Rating
Bradford Driver Jailed After Ramming Police Car in Huddersfield
Labour Loses Control of Hounslow Council After Councillor Charged with Fraud
Manchester Communities Invited to Apply for Remembrance Sunday Grants
Keighley Women and Children’s Centre Completes Major Expansion
Milton Keynes Man Convicted of Daesh-Related Terrorism Offences
Leeds Bradford Airport Workers Announce 48-Hour Strike
Bradford Youngsters to Mark World Food Day with Cookery Challenge
Four Men Charged Following Series of Warrants in Rochdale
Legal Show
Alim OnAir
Bhangra Nights
The Golden Era