Afghanistan's Islamist Taliban authorities have ordered a nationwide shutdown of the country's fiber optic internet "until further notice," according to a government source who spoke with French news agency AFP on the condition of anonymity. 

The Internet Outage Detection and Analysis, a project by the Georgia Institute of Technology that monitors and provides data on global internet connectivity, also reported the outage, showing nearly all internet connectivity going down by Monday afternoon.

The move represents the first nationwide shutdown of the internet in Afghanistan and will result in a "comprehensive, total blackout," according to London-based internet and cybersecurity watchdog NetBlocks.

Speaking before the shutdown, the unnamed government source told AFP, "There isn't any other way or system to communicate... the banking sector, customs, everything across the country will be affected."

It is unclear at this point just how hard telephone and cellular connections will be hit but AFP said it had lost phone contact with its Kabul bureau on Monday around 5:45 p.m. (1345 GMT).

Speaking with AFP, internet-access advocacy group NetBlocks said that phone communications in Afghanistan are largely routed through the country's fiber optic network, hence, "Physically pulling the plug on fiber internet would therefore also shut down mobile and fixed-line telephone services."

Kabul-based TOLOnews said the interruptions are affecting radio and television transmissions as well.

Taliban says 'immorality' and 'vice' forcing internet shutdown

The Taliban began severing fiber optic cables in other regions to combat "vice" several weeks ago.

Earlier this month, the Taliban's provincial spokesman in Balkh said that internet access had been cut on leadership's orders, noting, "This measure was taken to prevent vice, and alternative options will be put in place across the country to meet connectivity needs."

During that same time, similar restrictions were put in place in the northern provinces of Badakhshan and Takhar, as well as in Kandahar, Helmand, Nangarhar and Uruzgan in the south.

Internet speeds are now expected to be downgraded from 4G to 2G in the coming hours or days, posing potentially grave problems for the country's economy and its government administrators.

The Taliban has implemented numerous restrictions designed to combat "immorality" as defined by its strict interpretation of Islam since returning to power in 2021.

Edited by: Dmytro Hubenko