Well known British scientist Richard Dawkins has kicked up a controversy by comparing Ahmed Mohamed, the Texas teenager whose school project was mistaken for a bomb to an Islamic State killer, reports CNN.

Dawkins, who is also a foremost voice in the atheist movement, was tweeting in response to Mohamed's family demanding $15 million in damages and an apology from city and school officials in Irving, Texas for their conduct towards their son. Mohamed was detained, questioned, and taken with handcuffs after a teacher mistook the handmade clock he brought from home for a science project for a bomb.

Related read: After clock controversy, Ahmed Mohamed demands US $15 million

"Don't call him 'clock boy' since he never made a clock. Hoax Boy, having hoaxed his way into the White House, now wants $15 nillion in addition!" the renowned evolutionary biologist tweeted.

Don't call him "clock boy" since he never made a clock. Hoax Boy, having hoaxed his way into the White House, now wants $15M in addition! — Richard Dawkins (@RichardDawkins) November 24, 2015

Dawkins has always claimed that the incident which led to global support for Mohamed on Twitter happened due to a hoax propelled by the school kid himself. He had earlier said that Mohamed did not build a clock, but "took a clock out of its case and put it in a box." He has questioned his motives ever since.

@Mukhtarishaq2 He didn't make anything. He opened a clock, took out the innards and put them in a box so they looked like a bomb — Richard Dawkins (@RichardDawkins) November 24, 2015

Related read - Ahmed Mohamed clock controversy: Evolutionary biologist Richard Dawkins labels Texas teenager a fraud

Dawkins was criticised on Twitter for comparing Mohamed to an ISIS child fighter. He faced a lot of facing brickbats after tweeting the following.

.@RichardDawkins, analogizing a kid who modded a clock in a way he found insufficiently inventive to a child executioner. — Angus Johnston (@studentactivism) November 24, 2015

Dawkins who has also been a vocal critic of Islam of faced flak which said that he had anti-Muslim bias for making the comparison. To this he claimed that only the young ages of both kids were being compared and not the religion. He also said that he should have compared Mohamed to the killers of James Bulger. Bulger was a two year-old boy who was murdered by ten year-old in 1993.

"But he's only a kid." Yes, a "kid" old enough to sue for $15M those whom he hoaxed. And how old is this "kid"? https://t.co/kjzxGDs5Az — Richard Dawkins (@RichardDawkins) November 24, 2015

@yodat_nioj @oldgrower Oh for heaven't sake, can't you read? Their young AGES are being compared, nothing else. — Richard Dawkins (@RichardDawkins) November 24, 2015

How COULD you think I was likening a hoaxer to a killer? I just meant "Only a kid" is not a knockdown defence. Remember poor James Bulger? — Richard Dawkins (@RichardDawkins) November 25, 2015