An Afghan special forces commander, who was seeking shelter from the sun in a grove of trees by the river, said the bomb left a "big hole in the ground" and showed a picture of the bombing site on his phone.
Quoting a credible source, the Afghanistan news agency said, "Thirteen Indian Daesh militants were also among those killed in the attack".
Thirteen Indian ISIS militants and two of its commanders of Indian nationality were killed in the GBU-43/B attack by United States in Afghanistan on Thursday.
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Before the MOAB attack, two alleged Indian recruits - Mohamed Mursheed and Mohammad Hafeezuddin -died in the past two months.
The GBU-43 bomb, nicknamed MOAB for "massive ordnance air blast" or "mother of all bombs", killed 96 Islamic State militants, including four key IS leaders on April 13, the Pentagon and Afghan officials have said.
An IS media arm has said none of the group's fighters were killed in the attack.
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The blast destroyed three underground tunnels as well as weapons and ammunition, but no civilians were hurt, Afghan and USA officials claimed. The Pentagon said US forces in Afghanistan dropped a GBU-43B on an Islamic State target in Afghanistan on Thursday, April 13, 2017, in what a Pentagon spokesman said was the first-ever combat use of the bomb.
The US military previously estimated ISIS had 600 to 800 active fighters in the area.
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The news outlet added that the decision was supported by three court justices, while the two others heading the case voted against.