An Isis spokesman has published a call to arms for Muslims around the world to kill American, Canadian and European citizens for their governments' role in a coalition against the radical Islamist group in Iraq and Syria.

Following Australia's largest terror raids and France's first air strikes on the group, Isis (also known as Islamic State) spokesman Abu Muhammad al-Adnani ash-Shami called on supporters to launch insider attacks on western populations, particularly "the spiteful and filthy French".

"If you can kill a disbelieving American or European – especially the spiteful and filthy French – or an Australian, or a Canadian, or any other disbeliever [...] including the citizens of the countries that entered into a coalition against the Islamic State, then rely upon Allah, and kill him in any manner or way however it may be," he said in a 42-minute speech released on social media.

"Do not consult with anyone and do not seek anyone's advice. Whether they are civilian or military, the same ruling applies.

"Kill the disbeliever whether he is civilian or military, for they have the same ruling. Both of them are disbelievers. Both of them are considered to be waging war. Both of their blood and wealth is legal for you to destroy."

Adnani called the coalition against the terror group a "crusade" and warned Western civilians will not be safe, even in their own homes.

"You will not feel secure even in your bedrooms," he said. "You will pay the price when this crusade of yours collapses and thereafter, we will strike you in your homeland and you will never be able to harm anyone afterwards."

He went on to pick out US Secretary of State John Kerry for criticism, calling him an "uncircumcised old geezer" following his criticism of the group and their perceived distortion of the Islamic faith.

France is the first country to join the US in conducting air strikes against the group in Iraq, targeting an IS logistics depot last week. US President Barack Obama spoke about the close relationship between the US and France in light of its cooperation against radical Islamic terrorism.

"As one of our oldest and closest allies, France is a strong partner in our efforts against terrorism and we are pleased that French and American service members will once again work together on behalf of our shared security and our shared values," Obama said last week.

France has also been carrying out reconnaissance flights over Iraq this week and has started arming the Kurdish Peshmerga forces fighting against the group in northern Iraq.