Arsenal's £12 million bid for Marseille playmaker Samir Nasri could be derailed at the last minute after the attacking midfielder's agent disclosed that he was also considering other offers, one of which is believed to be from Lyon.

Reports in France last night indicated that the 20-year-old would be signing for Arsenal "within hours", but his agent, Jean-Pierre Bernes, said: "No agreement has been finalised. It's true we are looking into a bid by Arsenal that interests Nasri in sporting terms, but it's also true that other offers have entered my office."

It is understood that Arsenal have agreed a deal in principle with Marseille, though the French club were holding out for around £14.5?million. But Bernes said: "Samir Nasri can't already be considered an Arsenal player, not at all. It's premature."

There are still suggestions that Lyon could enter the race for Nasri in a swap deal with Hatem Ben Arfa.

In the wake of Marseille's win over Strasbourg last Saturday, which helped seal third place in the French League and Champions League qualification, Nasri had said: "Perhaps it's my last match for Marseille. It would be great to leave on that note."

Arsene Wenger, the Arsenal manager, has pursued Nasri, a France international widely regarded as the next Zinedine Zidane, in an effort to reinvigorate his midfield following the departure of Mathieu Flamini to AC Milan.