Nigeria's drugs agency has seized three million capsules of opioids, it said on Friday.

The authorities intercepted about 1,500kg (3,300lb) of Tapentadol and Carisoprodol, according to National Drug Law Enforcement Agency director Femi Babafemi, as quoted in the Punch newspaper.

The capture "followed a similar operation in which anti-narcotic officers of the agency also intercepted 8,613kg of cannabis smuggled in from Ghana," AFP news agency quoted Mr Babademi as saying.

He said the capsules were thought to have originated from China, and were falsely labelled as insulation fittings and industrial office printers.

However further investigation proved them to be from India and some suspects have been arrested, the news report added.