(AP) — Police unions across the U.S. are pushing for officers to be able to collect workers’ compensation benefits if they suffer post-traumatic stress disorder, whether they got it from the general stress of police work or from responding to a deadly shooting rampage.

But some police chiefs and municipal leaders oppose these efforts, even in states such as Connecticut and Colorado, the scenes of some of the deadliest massacres in recent years.

They say they are concerned the benefits would strain budgets and lead to frivolous claims.

Federal employees and military members can collect compensation if a psychiatrist finds PTSD symptoms. But most states require officers and firefighters to have an accompanying physical injury.

Supporters say efforts to change that are encouraging, but the push-back shows a stigma remains.