Iranian President "Hassan Rouhani" said today a Syrian peace conference planned for later this month will fail if Tehran, Damascus's main regional ally, doesn't participated.
The remarks came ahead of a meeting Monday at which Russia and the United States are to discuss Tehran's possible involvement in the talks set to start in Montreux, Switzerland on January 22.
"Any trans-regional meeting that is not attended by influential players will be unable to solve the Syria crisis", Rouhani told Russian President Vladimir Putin by telephone, the ISNA news agency reported.
"Thus, the Geneva-2 conference has already failed without it even being started", he added, calling the Russian-US initiated forum "a negotiation show".
Invitations to Geneva-2, already delayed by months, have been sent to 30 possible participants. But Iran isn't on the list, according to the United Nations.
On Monday, the Islamic republic brushed aside a US suggestion that it play a "sideline" role at the negotiations, with foreign ministry spokeswoman "Marzieh Afkham" calling the proposal insulting.
According to ISNA, Russian president "Vladimir Putin" reiterated Moscow's support and expressed hope "to convince our allies... that Iran, as a key actor, must be present at the talks", stressing "we believe any preconditions for Iran's participation are useless and unconstructive".
Iran says it supports a political solution to the Syrian crisis .