German authorities say a lawyer wounded in a series of stabbing and shooting attacks has died — bringing the death toll to three.

Police announced the 51-year-old man's death Sunday, news agency dpa reported. He was one of two lawyers attacked Friday at an office in the western city of Duesseldorf.

A third person was killed at another lawyers' office in nearby Erkrath before the suspected assailant, a Chinese-born resident, was arrested at a pizzeria near the Dutch border after threatening the owner with weapons.

Authorities say the assailant appeared to be seeking revenge over his conviction for slapping the owner of the pizzeria, where he once worked. He was represented in that case by the lawyers' office in Duesseldorf, then rejected as a client by the Erkrath office.