Another US hunter is suspected of killing a lion in Zimbabwe, the parks authority said Sunday, following the outcry over the killing of Cecil the lion by an American dentist.

A government statement said a crackdown since Cecil's killing had led to the arrest of safari organiser Headman Sibanda on allegations of breaching hunting regulations. It said his client was an American called Jan Casmir Sieski who was in Zimbabwe in April.

"Headman Sibanda's case is in connection with a lion that was killed by the other American (Sieski) in April," confirmed parks authority spokeswoman Caroline Washaya-Moyo.