Eden Prairie, Minn. ? Investigators are looking into a party attended by several Minnesota Vikings players that allegedly involved drunkenness, nudity and visible sexual activity on a pair of charter cruises last week.

No criminal charges had been filed as of Wednesday, and it could take a couple of weeks before investigators finish interviewing people who were on the boats, said Sgt. Haans Vitek of the Hennepin County Sheriff’s Office. A police report was filed Sunday.

“It doesn’t make things any simpler,” coach Mike Tice said Wednesday, “and quite frankly I’m not happy about it.”

Stephen Doyle, an attorney representing the boats’ owners, has said cornerback Fred Smoot paid for one of the cruises Thursday on Lake Minnetonka.