TEHRAN: Iran has rejected a US proposal for a 48-hour ceasefire, the semi-official Fars news agency reported on Friday.
The proposal was delivered to Iran through a "friendly" country on Thursday, Fars quoted an informed source as saying.
Washington has stepped up its diplomatic efforts to secure a ceasefire, particularly after an Iranian strike targeted a US "military forces depot" on Kuwait's Bubiyan Island, Xinhua news agency reported quoting sources.
According to Fars, assessments suggest that the proposal was put forward following an intensification of the crisis in the region and "serious problems" for US forces resulting from their country's "miscalculation" of Iran's military capabilities.
The report added that Iran's response to the offer was not given in writing, but through the continuation of attacks in the battlefield.
Meanwhile, the Iranian army confirmed that its air defence systems shot down a US A-10 "Warthog" attack plane over Iran's southern waters near the Strait of Hormuz, with the aircraft crashing into the Persian Gulf.