The incident occurred this evening when the duo, believed to be Shiv Sena workers, assaulted the forensic science head of the KEM hospital, a senior police official said.
"The two barged into the cabin of Dr Hari Pathak and assaulted him. One of the accused, who brought a sketch pen with him tried to write a number on Pathak's forehead," he said.
The two accused have been detained. A case under section 353 (assault or criminal force to deter public servant from discharge of his duty) of the Indian Penal Code (IPC) will be registered, the officer said.
Authorities at the KEM hospital had come in for severe criticism for marking numbers on the bodies of the Elphinstone station stampede victims and putting up their pictures on public display.