A shootout popped off at a one year old boys birthday party, leaving four dead and one seriously injured.

It all started with an argument at a toddler’s birthday party in South Texas. And it soon escalated into a shooting that left four men dead and a fifth man wounded, authorities said Sunday.

The shooting happened at a boy’s first birthday party Saturday afternoon near Corpus Christi, Texas, Texas Department of Public Safety Sgt. Nathan Brandley said those involved were distant relatives. 

A 20-year-old man was in custody Sunday, Brandley said. The man’s 37-year-old father was also a suspect, but he had not yet been arrested, Brandley said.

He identified those killed as 62-year-old Juan Espinoza Sr.; 20-year-old Juan Sandoval III; 22-year-old Jeremy Sandoval; and 25-year-old Nicky Sandoval. He said the three younger men are grandsons to Juan Espinoza Sr.

The wounded man, 43-year-old Juan Espinoza Jr., was airlifted to a Corpus Christi hospital. Brandley said he’s expected to survive.

Belinda Espinoza, the daughter of Juan Espinoza Sr., said her family grew up with the suspects and knew them well. She was not at the house when the shooting occurred.

She said her father was a farmer and a family man.

“He did everything he could for us,”she told CNN. “He was happily married to his first and only love my mother, Eulalia Sandoval.”

She said of her brother, Juan Espinoza Jr., “would give the shirt off his back for others and his children. He always opened his home to anyone.”