Iran's deputy health minister has denied a claim of a cover-up over the new coronavirus disease, as the number of confirmed deaths there rose to 12.
A parliamentarian for Qom, the city at the centre of Iran's Covid-19 outbreak, accused the authorities of lying about the full extent of the problem.
Ahmad Amirabadi-Farahani said there had been 50 deaths in Qom alone.
That was rejected by the minister, who vowed to resign if it could be proven that even half that number had died.
"I categorically deny this information," Iraj Harirchi told a news conference.
"This is not the time for political confrontations. The coronavirus is a national problem," he added.
More on the coronavirus outbreak
Government spokesman Ali Rabiei also insisted that officials would be transparent about reporting deaths associated with Covid-19, the infectious respiratory disease caused by the virus.
However, Mr Amirabadi-Farahani refused to retract his claim.
"I have given the names of 40 dead people to the deputy minister. Now, we await his resignation," he was quoted as saying by the Ilna news agency.
At least 61 cases of Covid-19 have been reported in Iran since last Wednesday.
Qom province is the worst hit, with 34 cases, according to the health ministry. Tehran has 13 cases, Gilan six, Markazi four, Isfahan two, and Hamadan and Mazandaran one each.
The authorities have ordered the closure of schools and universities in Qom in an attempt to prevent the spread of Covid-19.
Holy city at centre of outbreak
Qom, 120km (75 miles) south of Tehran, has a population of more than 1.2 million.
The city is visited by millions of Shia Muslim pilgrims and tourists from Iran and other countries every year because it is the location of the mausoleum of Hazrat Masumeh, a revered female saint who was the sister of the eighth Shia Imam.
Qom is also home to many of Iran's most senior Shia clerics, and tens of thousands of theology students come from across the world to attend its seminary.
Citing Health Minister Said Namaki, a spokesman for Iran's parliament told a closed session on Monday that "the cause of coronavirus infections in Iran is people who have entered the country illegally from Pakistan, Afghanistan and China", the Isna news agency reported.
Mr Namaki said in televised remarks on Sunday that one of the people who died in Qom was a merchant from the city who used to travel regularly to China.
He urged people to avoid travelling to Qom, which is a major destination for Shia Muslim pilgrims.
Also on Monday, Kuwait, Bahrain, Iraq and Oman became the latest Middle Eastern countries to report their first cases, all of them linked to Iran.
Kuwait said it had detected Covid-13 in three people – including one Kuwaiti mRead More – Source