Two brothers are in custody in the shooting deaths of their parents, who emigrated from Bangladesh 30 years ago and were found slain over the weekend in their California home.

Police arrested 22-year-old Hasib Bin Golamrabbi and his 17-year-old brother on suspicion of homicide Thursday. They're being held without bail.

The teen's name wasn't released.

The brothers are accused of killing Shamima and Golam Rabbi, who were found dead Sunday.

Police spokesman Sgt. Enrique Garcia says relatives discovered the bodies. It was unknown how long the couple had been dead.

Police haven't released a motive in the killings or any other details.