Police are seeking to hold three Chinese nationals and a Kenyan who was found in possession of game meat and ivory.
The state wants to be allowed to hold them for 10 days at Kilimani police station to allow completion of investigations.
The four namely Shang Li Yan, Xing Wei, Zhang Jie and David Oseko were arrested on Tuesday after neighbours complained of a foul smell emanating from their five-bedroomed house.
After raiding the house, officers found decomposing game meat in a freezer.
Also recovered were two ivory tusks and sculptures each, one lion sculpture, ivory bangles and necklaces, leopard skin and rhino horn all valued at Sh6.3 million.