California police have arrested a suspect in connection with the shooting death of Catholic Bishop David O'Connell, law enforcement sources told Fox News.

The Los Angeles County Sheriff's Department has yet to offer details regarding the person's identity. O'Connell, an auxiliary bishop of the Archdiocese of Los Angeles, was fatally shot in an incident at his home in Hacienda Heights this past weekend.

Deputies responded to the shooting, and when they arrived at the scene, they discovered O'Connell with a gunshot wound to the chest.

He was pronounced dead at the scene.

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Bishop David O'Connell

Bishop David O'Connell was shot to death over the weekend. (Sarah Reingewirtz / MediaNews Group / Pasadena Star-News via Getty Images)

"It's very early in the investigation," sheriff's department homicide bureau Detective Michael Modica said Sunday. "We got a lot more steps we have to take to make more determination to what's happening."

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O'Connell, 69, was named an auxiliary bishop of the Archdiocese of Los Angeles by Pope Francis in 2015.

Archbishop José H. Gomez announced the news during Mass on Saturday.

"Our beloved Auxiliary Bishop David O'Connell has passed away unexpectedly," he said. "It's a shock and I have no words to express my sadness. As a priest and later a bishop here in Los Angeles for 45 years, Bishop Dave was a man of deep prayer who had a great love for Our Blessed Mother. He was a peacemaker with a heart for the poor and the immigrant, and he had a passion for building a community where the sanctity and dignity of every human life was honored and protected."

Bishop David OConnell of St. Cornelius Catholic Church, hosts a community memorial service

Bishop David O'Connell of St. Cornelius Catholic Church hosts a community memorial service. (Robert Gauthier / Los Angeles Times via Getty Images)

Bishop David O'Connell, of the Archdiocese of Los Angeles' San Gabriel Pastoral Region

Bishop David O'Connell, of the Archdiocese of Los Angeles' San Gabriel Pastoral Region, was shot and killed inside his home. (Sarah Reingewirtz / MediaNews Group / Pasadena Star-News via Getty Images)

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"He was also a good friend and I will miss him greatly. I know we all will," Gomez continued. "Please join me in praying for Bishop Dave and for his family in Ireland. May Our Lady of Guadalupe wrap him in the mantle of her love, and may the angels lead him into paradise, and may he rest in peace."