PLAQUEMINES PARISH - Sheriff's deputies in Plaquemines Parish say they have made the largest drug seizure in parish history.

The Plaquemines Parish Sheriff's Office says narcotics agents seized nearly 200 pounds of cocaine with an estimated street value of $18 million.

Sheriff Lonnie Greco of PPSO said the sheriff's office received an anonymous tip around 10:30 p.m. Thursday reporting four suspicious packages. Deputies seized the packages to find 81 individually wrapped kilogram packages inside.

According to PPSO, preliminary tests revealed the contents of the packages to be pure cocaine.

Plaquemines Parish deputies are working in connection with the United States Homeland Security Investigation's New Orleans Field Office to continue the ongoing investigation into the drug trafficking activity.