Iran's coronavirus death toll rose by 90 in the past 24 hours reaching 5,481, while the total number of confirmed cases rose to 87,026, Health Ministry spokesman Kianush Jahanpur said Thursday.
The daily rise in the death toll has held below 100 since April 14 as the country's leaders have pushed to resume ordinary life.
Authorities allowed shopping malls, bazaars and parks to re-open this week and also lifted a ban on inter-city travel.
State TV showed footage earlier this week of highways in Tehran packed with cars and groups of people out shopping.
However, Tehran called for the US to be held accountable for "cruel" sanctions that have hampered its efforts to fight a coronavirus outbreak that it said are responsible for the recent deaths.
"Today, the coronavirus has spread not only in Iran but in almost all countries, and it requires serious effort and collective action to deal with it," said Iran's deputy foreign minister, Abbas Araghchi.
"In addition to fighting the virus, Iran faces illegal and inhuman American sanctions, doubling the pressure on the Iranian people," he was quoted as saying in a ministry statement, AFP reported.
Araghchi added: "The United States' cruel and unilateral sanctions against Iran constitute a clear violation of Security Council Resolution 2231, and the United States must therefore be held accountable by the international community."
In Iran, medicines and medical equipment are technically exempt from the US sanctions but purchases are frequently blocked by the unwillingness of banks to process purchases for fear of incurring heavy US penalties.
Iran's coronavirus outbreak, which first emerged in the city of Qom on February 19, is one of the deadliest in the world.
Separately, Iran's Revolutionary Guards chief on Thursday warned the US of a "decisive response" after President Donald Trump said he instructed the US Navy to "shoot down" Iranian boats that harass US ships in the Gulf.
"We declare to the Americans that we are absolutely determined and serious... and that all action will be met with a decisive response that will be efficient and quick," Major General Hossein Salami told state television.
"We have also ordered our naval units to target (US boats and forces) if they try to endanger the safety of our ships or boats of war."
Trump took to Twitter on Wednesday after Iran's Revolutionary Guards said they had launched the country's first military satellite.
The US president said he had "instructed the United States Navy to shoot down and destroy any and all Iranian gunboats if they harass our ships at sea".
