The Minneapolis Police Department is looking into a possible sexual assault in an Uptown parking ramp Sunday night.

About 9 p.m., witnesses found a woman "lying unconscious near her running vehicle" at the Calhoun Square parking ramp located next to the indoor dining and shopping center at Lake Street and Hennepin Avenue South, according to a news release.

The woman was partly undressed, did not remember anything and could have been raped, authorities said in the release.

Authorities have limited information and there is no suspect description.

Police asked that anyone with information, including anything that could help identify a suspect, to call the sex crimes unit at 612-673-3081, the tips line at 612-692-8477 or the free Minneapolis Police Department tips line 411.

Karen Zamora • 612-673-4647

Twitter: @KarenAnelZamora