Junior Seau's family has filed a lawsuit against the NFL, claiming his suicide was a result of brain disease cause by violent hits during his career.

The wrongful death lawsuit, filed Wednesday in California Superior Court in San Diego, blames the NFL for its "acts or omissions" that hid the dangers of repetitive blows to the head. It says Seau developed chronic traumatic encephalopathy (CTE) from those hits, and accuses the NFL of deliberately ignoring and concealing evidence of the risks associated with traumatic brain injuries.

Seau shot himself last May at the age of 43.

"Our attorneys will review it and respond to the claims appropriately through the court," the NFL said in a statement Wednesday.

Helmet manufacturer Riddell Inc., also is being sued by the Seaus, who say Riddell was "negligent in their design, testing, assembly, manufacture, marketing, and engineering of the helmets" used by NFL players. The suit says the helmets were unreasonably dangerous and unsafe.