US President Donald Trump says the United States is having "good talks" with Iran, and there is a chance of a deal over their conflict, but he warns that US strikes will resume if the negotiations fail to deliver.Despite Mr Trump's optimism, Tehran appeared to quickly test the pause in the US military campaign, with Saudi Arabia, Jordan and Iraq reporting drone attacks on Monday, local time.Washington abruptly suspended a two-week campaign of air strikes on Iran on Saturday in Mr Trump's latest strategic U-turn in the five-month-old conflict."We're having good talks," Mr Trump said."I think there's a good chance that something could happen, and if it does, good, if it doesn't, we go back to doing what we were doing two days ago."At a campaign rally in Michigan later the same day, Mr Trump said of Iran: "You can't bribe them Right now, there are very friendly negotiations going on."Iran's Foreign Ministry spokesman Esmail Baghaei said that messages were still being passed between the sides through mediators and Iran had not forsaken diplomacy, but reports that it requested negotiations were "fabricated"."This is not in our DNA," he said.A senior Iranian official said on Sunday that Iran would halt its own attacks as long as Mr Trump's self-imposed ceasefire continued, Reuters reported.Iran's central military command later on Monday accused the US of threatening vessels and oil tankers in its territorial waters and of "attempting to implement an illegal maritime blockade", which it said, "constitutes an escalation of the conflict in the region."Saudi Arabia said it shot down drones aimed at petroleum targets, including in Riyadh