The United States imposed new sanctions on Tuesday targeting 14 people and companies that help Iran obtain weapons as Tehran works to rebuild its ballistic missile inventories after US-Israeli attacks , the Treasury Department said.
The targets, which also include aircraft, are based in Iran, Turkey and the United Arab Emirates and were cited for their involvement in procuring or transporting weapons or components on Iran's behalf, Treasury said in a statement.
The new sanctions come as Washington and Tehran are at a standoff over whether to begin a second round of talks to reach a deal that would keep the Strait of Hormuz open and bring an end to the US-Israel war on Iran.
A two-week ceasefire announced by US President Donald Trump is due to end in the coming days and he has said he is ready to resume military action.
"As the United States continues to deplete Iran’s ballistic missile inventories, the regime is seeking to reconstitute its production capacity," Treasury said.
"Iran is increasingly relying on Shahed-series one-way attack unmanned aerial vehicles (UAVs) to target the United States and its allies, including energy infrastructure in the region."
There was no word from Tehran on the ceasefire and an Iranian gunboat fired on a container ship off the coast of Oman , causing damage but no casualties, according to a British maritime security agency.
On the Lebanon front, where a truce is also in place in the Israel-Hezbollah conflict, an Israeli strike on an area where the Iran-backed group has long held sway killed one person, Lebanese state media said.
Trump said he had pushed back the end of the two-week truce following a request by Pakistani mediators and to give Iran's "fractured" leadership time to form a proposal.
The ceasefire has brought some respite to a region engulfed for weeks in war but with no agreement yet in place, uncertainty has remained and brought little relief to global markets.
Trump, who said the US blockade of Iran's ports would continue, also said the Islamic republic was "collapsing financially" due to the blockade of Hormuz.
"They want the Strait of Hormuz opened immediately - Starving for cash! Losing 500 Million Dollars a day. Military and Police complaining that they are not getting paid. SOS!!!" he wrote on social media.
Iran has all but shut the strait, a key conduit for global energy flows, since the United States and Israel launched a massive attack on the Islamic republic that sparked the Middle East war .