Former NFL star Junior Seau was found dead Wednesday of an apparently self-inflicted gunshot wound at his home north of San Diego, authorities said.

Frank McCoy, chief of police in suburban Oceanside, said the 43-year-old Seau was found with a gunshot wound to the chest at his beachfront home north of San Diego by "a young lady who indicated that she was Junior Seau's girlfriend".

"She indicated that she returned to the residence to find Mr. Seau unconscious, suffering from a gunshot wound to the chest," McCoy said, adding that police and fire department personnel responded to her call but found Seau dead.

"This case at this point is being investigated as a suicide, a handgun was found near the body," McCoy said.

The San Diego Chargers, his former team, voiced shock at "the passing of Junior Seau."

"Everyone at the Chargers is in complete shock and disbelief right now. We ask everyone to stop what they're doing and send their prayers to Junior and his family," the team said in a brief statement.

Seau spent 13 seasons with the Chargers, helping the team reach the Super Bowl after the 1994 season.

He was inducted into the Chargers Hall of Fame in November.

Seau's mother, Luisa Mauga Seau, spoke emotionally to reporters gathered outside her son's home.

"I appreciate you show your love to my son," she said. "I don't know what I'm going to do... Take me. Take me. Leave my son alone."

Seau's sister, Annette, asked the media to respect the family's privacy.

"My brother was a loving brother, a caring citizen, so I would appreciate it if you would just honor his last day and give us some kind of peace and privacy," she said.

Seau is the eighth member of San Diego's Super Bowl team to pass away, joining linebackers Lew Bush, Dave Griggs and Doug Miller, running back Rodney Culver, defensive linemen Shawn Lee and Chris Mims and center Curtis Whitley.

The former linebacker -- who was selected for the Pro Bowl 12 times -- was arrested on suspicion of domestic violence in October 2010 after an incident with his girlfriend, but was never charged.

A few hours after he posted bail his SUV plunged down an ocean side cliff but Seau escaped serious injury.

Seau also played three NFL seasons for Miami and four for New England before retiring in 2009.