11/06/2013 02:03 EST | Updated 01/23/2014 06:58 EST

Composite sketch prompts dozens of tips as police seek suspect in UBC attacks

VANCOUVER - Tips are flooding in about the suspected sexual attacker roaming the University of British Columbia's campus in Vancouver.

RCMP Sgt. Peter Thiessen says investigators have received 57 tips of varying reliability in barely 24 hours since issuing a composite sketch of the man believed responsible for six assaults since last April.

Thiessen says the tips have arrived from across the province and around Canada and that officers are working through the details, hopeful they will lead to a break in the case.

The sketch, compiled after interviews with the six female victims, shows a hoodie-clad, slightly unshaven Caucasian man with an olive or darker skin tone, rounder chin, broad forehead, straight nose and short dark hair.

Security on the UBC campus has been stepped up since one woman was assaulted in September, three were attacked last month and officers then linked separate incidents in April and May to the same man.

In each case, the victim was walking alone, late at night, when she was jumped from behind, groped, and one woman was also punched in the face.