A man suspected of beating a number of homeless men to death in Los Angeles has admitted killing his own aunt and uncle.

Ramon Alberto Escobar, 47, confessed to killing Dina Escobar and her brother Rogelio Escobar.

The pair went missing in September and their bodies have never been found.

Houston police said Escobar confessed to killing his relatives after Houston detectives questioned him about their disappearance during an interview at a Los Angeles county jail.

He was charged with capital murder on Tuesday.

Ramon Escobar, 47, has admitted killing his aunt and uncle. Siblings Dina Escobar and Rogelio Escobar (pictured) disappeared in Houston. Their bodies have never been found.

Authorities say Escobar was questioned at the time of their disappearance and shortly after fled to California, where they say he began a string of attacks on at least seven men, most of them homeless.

Four of the men died.