North Korea's Kim Jong-un has told crowds in Pyongyang the days when their country could be threatened are "forever gone", in his first public speech as leader.

He was speaking during a huge military parade in the capital's main square, during which what appeared to be a large new missile was unveiled.

Damian Grammaticas reports from Pyongyang.

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Watch more of Damian Grammaticas' reports form North Korea below.

Damian Grammaticas reports from a mass rally for the country's new leader Kim Jong-un.

Damian Grammaticas reports from elaborate unveiling of two giant statues.

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Damian Grammaticas looks around North Korea's rocket launch site

Damian Grammaticas visits a fruit farm in North Korea

Damian Grammaticas watches 100th anniversary celebrations for Kim Il Sung