PETROL bombs have been thrown at a house and a man in two separate incidents in Hightown.
A lit bottle of accelerants was thrown at a flat in Hare Park Close at about 10pm last Friday.
The window sill and glass window pane were damaged by a small fire.
A number of adults were in the house at the time but nobody was injured.
Police said no suspects were seen and launched an appeal.
The second petrol bomb was thrown at about 2.20pm on Tuesday.
Police said the bottle of accelerants was thrown at one of the complainants from the first incident, while he was walking in Eleventh Avenue, Windy Bank estate.
Nobody was hurt and the bottle burnt out on the pavement.
A spokesman said both incidents were being linked and three men had been arrested.
One suspect was arrested on Tuesday night and two more suspects were arrested on Wednesday morning.
Insp Tim Holland from Spen Neighbourhood Policing Team said he wanted to reassure the public following the two attacks.
“These incidents are restricted to two small groups of people and do not affect the general public,” he said.
“Detectives are investigating the incidents and we would urge people with any information to contact the police or use Crimestoppers.”
Any witnesses or anyone with information is asked to contact Det Sgt Jason Thorpe at Dewsbury CID on the non-emergency number 101 or Crimestoppers anonymously on 0800 555 111.