Nov 28 (Reuters) - An avowed white supremacist pleaded guilty on Monday to first-degree murder and other state charges in a mass shooting that killed 10 people in May at a supermarket in a predominantly Black neighborhood of Buffalo, New York, prosecutors said.The grand jury indictment, which included a charge of domestic terrorism motivated by hate, accused Gendron of carrying out the attack based on the perceived race of his victims.He was looking for a public location in an area where many Black people lived.Terrence Connors, an attorney for relatives of seven of the dead and two surviving victims, said earlier that Gendron had no plea agreement with prosecutors.A separate indictment returned in U.S. District Court in July charged Gendron with 27 federal hate crimes and firearms offenses, for which he could face the death penalty if convicted."