HOUSTON (AP) — An 18-year-old man is being held without bond on a capital murder charge after Houston authorities say he fatally shot two brothers in an ambush attack from a rooftop.

Marlon Valdez was being held Monday in the Harris County jail after appearing before a judge a day earlier who denied bond for the Mexican national.

Authorities say Valdez was atop an abandoned home Thursday and armed with a semi-automatic rifle when he fired on a group of people as they arrived to settle a lingering feud with another group.

Police Chief Art Acevedo previously said the "coward shot these young people like they were deer."

Authorities say brothers Josue and Maximo Aguilar were killed and two others wounded.

Online jail records didn't indicate whether Valdez has an attorney to speak for him.