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MINNEAPOLIS, MN — Federal authorities say they’ve now been contacted by a representative for the Minnesota dentist who killed a protected lion in Zimbabwe.

The U.S. Fish and Wildlife Service tweeted Friday that the agency was voluntarily contacted a day earlier by a representative of Walter Palmer and appreciated the cooperation.

An agency spokesman verified the tweet but declined further comment.

The agency sent out a public statement Thursday saying it had made multiple attempts to reach Palmer, and it asked that the dentist or his representative immediately contact agency officials.

The agency is investigating the circumstances surrounding the death of the lion, named Cecil. Friday’s tweet says the investigation is ongoing.

For more on Dr. Palmer, watch the video above.

In the meantime,  Zimbabwean wildlife authorities say they have suspended the hunting of lions, leopards and elephants in an area favored by hunters following Cecil’s killing.

The National Parks and Wildlife Authority said Saturday that bow and arrow hunts have also been suspended unless they are approved by the authority’s director.

The authority says it is also investigating the killing of another lion in April that may have been illegal. It says it only received the information this week.

For more on Cecil the Lion, click here.