Nigeria's customs service has intercepted 7,000 donkey penises at an airport in the commercial hub, Lagos, that were headed to Hong Kong, according to an official.

The animal parts were packed in 16 sacks found in the animal export section, said Sambo Dangaladima, the customs controller at Murtala Muhammed airport.

He said the smell from the sacks aroused suspicion of the authorities.

The consignment is estimated to be worth 200 million Naira ($478,000; £416,000)

A suspect linked to the package is said to have escaped.

Donkey parts are sought after in China where they are used to make traditional medicine.

Nigerian law forbids export of donkey parts.