Sayyed Hassan Nasrallah, chief of the Lebanon-based Shiite militant group Hezbollah, has held talks with top Iranian officials over the impending US strike on Syria.
Nasrallah met Alaeddin Boroujerdi, Iran's chairman of parliamentary committee for national security and foreign policy, in the Lebanese capital Beirut over the increasing tensions in the region.
Hezbollah militants have been fighting on behalf of Syrian President Bashar al-Assad in recent months tilting the balance in favour of the Assad regime.
The talks between the insurgent leader and the Iranian officials focussed on the "developments in the region, particularly in Syria and Lebanon," said an official statement.
The meeting was also attended by Iran's ambassador to Lebanon, Ghadanfar Roknabadi.
The Iranian delegation led by Boroujerdi also held separate talks with senior Lebanese leaders over the situation.
According to the state-run National News Agency, following the meeting with Adnan Mansour, the interim foreign minister of Lebanon, Boroujerdi said there is a "US plot against the [Middle East] region's security and stability. US President Barack Obama would act wisely and would not rush in his decision on taking a military action against Syria. We hope that the US Congress would have the same level of self-restraint and wisdom to prevent acts that threaten the security of the region,"
The Iranian delegation had earlier met Assad in Damascus.
Iran and its perceived long arm Hezbollah, both Shiite-oriented, have been strongly supporting Assad who belongs to the minority Alawite community, an offshoot of Shiite Islam.
The two and a half year long Syrian conflict has sparked widespread sectarian clashes in which the majority Sunni insurgents are fighting to uproot Assad's Alawite regime.