Manchester City have bid in the region of £25m for Barcelona striker Samuel Eto'o, BBC Radio 5 Live understands.
The Spanish club's president Joan Laporta claimed City have made the 28-year-old Cameroon international a "stratospheric offer" to join them.
City refused to confirm or deny that they have made an offer.
Eto'o joined Barcelona in 2004, signing from Mallorca for a fee of about £16m, and has since scored more than 100 goals in his five seasons with the club.
He helped the Catalan side to win a treble trophy haul of the Spanish league title, domestic cup and Champions League in the 2008-2009 campaign.
Eto'o scored the opening goal in the Champions League final in Rome as Barcelona beat Manchester United 2-0.
In doing so he became only the second player, after Raul, to score in two Champions League finals because Eto'o was also on target in Barcelona's 2-1 victory against Arsenal in 2006.
And it is believed City are also chasing Manchester United forward Carlos Tevez, who is soon to be out of contract, and Everton defender Joleon Lescott.