Hong Kong customs officials seized an illegal shipment of ivory tusks, rhino horns and leopard skins worth more than $5 million, officials said Wednesday. The haul, which included more than 1,000 elephant tusks, was the second seizure of endangered species parts in a month in the city, home to one of the busiest ports in the world. Customs officials discovered the illicit goods hidden in a cargo container officially declared to contain “red cam process wood” exported from Nigeria. No arrests were made. Last month, more than 1,000 ivory tusks, mainly from baby elephants, were seized by the city’s customs.