Tehran, Iran ? Iranian officials signaled Monday that they would look seriously at the package of incentives offered by world powers if Iran suspends its nuclear program.

European envoy Javier Solana arrived Monday night in the Iranian capital with the package and was scheduled to deliver the proposal this morning. He struck a conciliatory note in a short statement at the airport, urging “a fresh start.”

The Iranians’ tone, too, was more conciliatory and careful than over the past several days, when President Mahmoud Ahmadinejad and Supreme leader Ayatollah Ali Khamenei made comments that sounded as if they were preparing to dismiss the proposal.

On Solana’s arrival, however, officials suggested that there could be many rounds of negotiation as their leaders study the proposal, consider what steps to take and discuss possible additions or changes.