ATTLEBORO — The president of the city firefighters union is accusing Mayor Paul Heroux of denying injured-on-duty benefits to a firefighter hospitalized with COVID-19, but Heroux vehemently disputed the claim.

The firefighter tested positive for the virus and was hospitalized earlier this week at Sturdy Memorial Hospital due to the severity of his symptoms, Paul Jacques, president of the Attleboro Firefighters Local 848, said Friday.