A Sydney teenager arrested after a bogus report about a shooting triggered an emergency police operation has claimed his laptop was hacked and he is the victim of an online hoax.

Police descended on the Arncliffe home just after 4.40am on Wednesday after emergency services received a report that the 18-year-old had tied up his father and a friend and was planning to shoot them because they had sexually assaulted his mother.

On arriving, police established a perimeter around Bonar Street and started speaking to the teenager inside the house. He surrendered without incident and was arrested.

No one was injured and a during a search of the house police said they found no evidence to support any of the initial claims made to emergency services.