The Federal Bureau of Investigation is involved in an investigation in Wichita, Mayor Jeff Longwell confirmed Monday night.

Longwell says the investigation could lead to federal charges, which could be announced within two weeks.

He says he does not know what type of activity is being investigated.

Last week, the FBI confirmed with Eyewitness News that it has "a lawful presence within the greater Wichita area."

The FBI also has not confirmed the nature of its investigation.

We've learned several homes have been searched.

Eyewitness News has been working to track down details of the investigation and who may be involved since we first learned about it on Feb. 9. We will continue working to get answers in the days and weeks ahead.