Mr Hassan however said the police were on the trail of the principal suspect.
He also stated that NDLEA officers seized at least 120,000 capsules of tramadol on November 27.
He said that the suspect planted a foreign variety of cannabis sativa in his maize farm.
NDLEA intercepted over two tonnes of illicit substances in Lagos, Ogun, Edo, Ekiti, Anambra, Ondo, and Kogi.
Other NDLEA operatives evacuated 808kg of Indian hemp from a forest at Igueben in Edo on Monday, November 13.
Monday Joseph, a 27-year-old suspect arrested for cultivating Indian hemp in Ondo, says he prefers drug trafficking to armed robbery.
The commander explained that the 398,192kg of drugs seized included Indian Hemp, cocaine, methamphetamine, tramadol, and psychotropic substances.
Briefing Journalists on the development, the spokesperson of the command, SP Nafi’u Abubakar described the arrest as “huge”.
The various drugs seized included Indian Hemp, Cocaine, Methamphetamine, Tramadol and other Psychotropic substances.
He stated that the 53-year-old driver of the vehicle, Onyebuchi Nlededin, was arrested.
