FORT WAYNE, Ind. (WANE)– A WANE 15 crew spotted heavy police and SWAT presence at the 2600 block of West State Blvd. Wednesday evening.

According to Fort Wayne police, a search warrant was issued at a vacant business in the Tower Plaza shopping center.

Police were seen using a flash grenade and yelling for people to exit the building with a megaphone.

A WANE 15 crew also observed four people being led out of the building in handcuffs.

A police officer said the FBI is in charge of the investigation. On Thursday WANE 15 contacted the FBI and was told the agency was assisting the DEA. WANE 15 has since contacted the DEA and is awaiting a response.