BRISTOL, Tenn. (WJHL) — Federal authorities say four people were arrested Thursday in an operation in Bristol.

According to a Drug Enforcement Administration (DEA) spokesperson, the suspects were taken into custody with help from other agencies.

The spokesperson said the operation came after seven people were indicted Wednesday following a year-long drug investigation. Three of those people were charged in connection to an overdose death stemming from the sale of fake pills containing fentanyl.

One of the indicted suspects was already in custody and four were arrested Thursday, according to the DEA. Two suspects remain at large.

Police from multiple agencies lined State Street earlier Thursday morning in front of a business near West State Street and 16th Street.

News Channel 11 had a crew at the scene that saw officers and agents with the Federal Bureau of Investigation (FBI), Drug Enforcement Administration (DEA), and Bristol, Tennessee Police Department.

During a video taken by News Channel 11 viewer Matthew Webb, several loud bangs and smoke can be heard and seen. An announcement claiming to be from the FBI can be heard in a second video posted on social media.