aged four and 10, were found dead in their home.
Police went searching for Aza Vindinhar,, aged 15, who fled the family home in the suburb of West Point on a bicycle.
He was apprehended by police and later taken to hospital for evaluation, Fox News outlets have reported.
Police have yet to say how the two young boys died.
The four-year-old boy was discovered by his mother, who had been out of the house running errands. When police arrived on the scene the 10-year-old was also pronounced dead.