Sheboygan, Wis. (WHBL) -  Sheboygan Police are investigating reports of two separate armed robberies which occurred in the city of Sheboygan overnight.  One reportedly occurred in the Indian Mound Trailer Park when several people with a gun demanded money from a woman.  The other occurred about 10:30 in the 1200 block of Penn Avenue when the victim was robbed at gunpoint.  Captain Steve Cobb said police are still attempting to sort out exactly what happened and the investigation is continuing.