Hackers affiliated to Islamic State (Daesh) vowed to take down Google but instead ended up hacking a smaller Indian website with a similar name.

The Cyber Caliphate Army, a hacker’s group affiliated to IS hacked www.adgoogleonline.com a website which offers search engine optimization services to clients, the Hindustan Times reported.

“We promised to hack Google. Keep the promise inshallah (God willing), expect us today,” the group declared on messaging app Telegram on Monday, according to vocative.com.

But hours later, the hacking group had instead defaced addgoogleonline.com – which is completely unrelated to Google.

After the website was hacked it played an IS song in French along with a sign which said, ‘hacked by CCA’.

The group has hacked over 35 British websites.

The hackers state that this attempt is revenge for David Cameron for killing British-born IS hacker Junaid Hussain, who is believed to have been killed in a US-led airstrike.

Twitter and Facebook are tracking down accounts used to spread terrorism as governments push them to collaborate in their counter-terrorism operation.