The most recent case was in February when undercover agents were offered a large amount of radioactive caesium, the BBC reports.
Investigators say much of the material is believed to come from Russia. They say some gangs have alleged links to Russia's intelligence services.
Police and judicial authorities in Eastern European country of Moldova shared information with an American news agency, Associated Press, to highlight how dangerous the nuclear black market has become.
They say the deterioration in relations between Russia and the West has made it more difficult to know whether smugglers are succeeding in selling radioactive material “originating from Russia abroad”.
Moldova is a former Soviet republic.
"We can expect more of these cases," said Moldovan police officer Constantin Malic, who investigated all four cases.
"As long as the smugglers think they can make big money without getting caught, they will keep doing it."
In many cases seen by the American news agency, deals were broken up by police in the early stages but ringleaders managed to escape - possibly with their nuclear contraband.
In the case involving the caesium, the would-be smuggler wanted 2.5m euros (£1.8m) for enough radioactive material to contaminate several city streets - and specifically sought a buyer from the Islamic State of Iraq and Syria (ISIS).
At a club in the Moldovan capital Chisinau he told a potential client - who was really an informant: "You can make a dirty bomb, which would be perfect for the Islamic State. If you have a connection with them, the business will go smoothly."
A sample vial of less-radioactive caesium 135 was produced and police pounced, arresting the man and two others.
In 2010 three people were arrested after a sawn-off piece of a depleted uranium cylinder was exchanged for cash, the American news agency reports. In 2011, investigators broke up a deal to sell weapons-grade uranium to a potential buyer in the Middle East.
Late last year a sample of unenriched uranium was exchanged for $15,000 (£9,800). Six people were arrested but five got away, the agency said.
It is not clear whether the cases in Moldova indicate a more widespread nuclear smuggling operations, the report says.
Eric Lund, spokesman for the US State Department's bureau in charge of non-proliferation said Moldova had taken "many important steps" to strengthen its counter nuclear smuggling capabilities.
KARACHI - Following are the foreign currency exchange rates for US Dollar, Saudi Riyal, UK Pound Sterling, U.A.E. Dirham, European Euro, and other foreign currencies in Pakistan open market on February 4, 2023 (Saturday).
Source: Forex Association of Pakistan. (last update 09:00 AM)
|UK Pound Sterling||GBP||337.01||337.71|
|Hong Kong Dollar||HKD||34.19||34.54|
|New Zealand Dollar||NZD||173.25||175.25|
KARACHI – The price of a single tola of 24-karat gold in Pakistan is Rs 205,200 on Saturday. The price of 10 grams of 24k gold was recorded at Rs175,930.
Likewise, 10 grams of 22k gold were being traded for Rs167,318 while a single tola of 22-karat gold was being sold at Rs 195,157.
Note: The gold rate in Pakistan is fluctuating according to the international market so the price is never been fixed. The below rates are provided by local gold markets and Sarafa Markets of different cities.
|Lahore||PKR 205,200||PKR 2,430|
|Karachi||PKR 205,200||PKR 2,430|
|Islamabad||PKR 205,200||PKR 2,430|
|Peshawar||PKR 205,200||PKR 2,430|
|Quetta||PKR 205,200||PKR 2,430|
|Sialkot||PKR 205,200||PKR 2,430|
|Attock||PKR 205,200||PKR 2,430|
|Gujranwala||PKR 205,200||PKR 2,430|
|Jehlum||PKR 205,200||PKR 2,430|
|Multan||PKR 205,200||PKR 2,430|
|Bahawalpur||PKR 205,200||PKR 2,430|
|Gujrat||PKR 205,200||PKR 2,430|
|Nawabshah||PKR 205,200||PKR 2,430|
|Chakwal||PKR 205,200||PKR 2,430|
|Hyderabad||PKR 205,200||PKR 2,430|
|Nowshehra||PKR 205,200||PKR 2,430|
|Sargodha||PKR 205,200||PKR 2,430|
|Faisalabad||PKR 205,200||PKR 2,430|
|Mirpur||PKR 205,200||PKR 2,430|