US President Joe Biden has ordered B-52 bombers and Spectre gunships to target Taliban positions in Afghanistan who are advancing towards key cities, MailOnline reported on Saturday as embattled Afghan security forces are fighting the resurgent group in various parts of the country.

These bombers are being supported by the AC-130 Spectre gunships which are armed with a 25mm Gatling gun, a 40mm Bofors cannon and a 105mm M102 cannon, which can provide pinpoint accurate fire from the air, the report said.

Analysts predict that the fall of Zaranj city on the border with Iran will deprive the Afghan government from $175 million in revenue a year.

With the fall of Zaranj, the Taliban is now controlling at least 10 border towns, including Islam Qala and Torghundi in Herat, Abu Nasr-e-Farahi in Farah, Spin Boldak in Kandahar, Sher Khan in Kunudz, Dand-e-Pathan in Paktia, Ai Khanum in Takhar and Ishkashim crossing point in the northeastern province of Badakhshan.