The elderly man from the former republic of Serbia and Montenegro was walking on a street in a southern district of Munich on Monday when he passed a group of about eight young people, police reported on Tuesday.
After two of the youth approached him, one hit him in the face while another kicked him. When the driver of a passing truck stopped to help the man, the group of young people fled.
The victim sustained an injury on his face, but did not require medical attention. Police have been unable to find the culprits nor ascertain a motive for the attack. The youth are thought to be around 16-years-old and of Turkish origin.
The incident comes after the sentencing of two young men for a brutal December attack on a 76-year-old retired teacher that sparked a heated debate over crime committed by young immigrants.
Last week, a court in Munich sentenced Turkish-born Serkan Aksu, 21, to 12 years in prison. Greek-born Spyridon Loukas, 18, was given an 8.5-year sentence.
That attack become the centerpiece of an acrimonious election campaign in the state of Hesse in January.