It has been reported by the Italian news outlet that Premier League outfit Southampton are also in the running for the services of the 25-year-old striker.
There are four more English top-flights clubs reportedly looking for the signature of Okaka.
Last month, Gianlucadimarzio.com claimed that Sunderland have made enquiries about Okaka, who played in England back in 2010-11 when he was on loan at Fulham from Roma.
Okaka scored four goals and created 27 chances in 31 Serie A appearances in the recently concluded 2014-15 season.
The former Parma striker had a pass accuracy of 77% and a shot accuracy of 44%, and he won 26 headers, 38 dribbles and 18 tackles.
With so many Premier League clubs allegedly interested, it will come as a shock if Leeds are able to sign Okaka this summer.