Police are launching an urgent search for a young man who allegedly sexually assaulted an elderly woman in an elevator

Police are searching for a man who allegedly sexually assaulted an elderly woman after exposing himself to her in an elevator in Melbourne’s inner south.

The man, in his 20s, is believed to have waited for the woman to enter a lift in South Yarra before exposing himself to her at 2pm on April 1.

He then followed the woman to another floor of the Simmon Street building and sexually assaulted her before running away.

Victoria Police believe the man is around 180cm tall, has black hair and is of Asian descent.

He was last seen wearing a black hoodie with “Jordan” written on the back, as well as black pants and black sneakers.