PM condemns Indonesia church attacks

The Australian government has condemned the attacks on churches in Indonesia that have killed 13 people and wounded dozens more.

A statement on Sunday from Prime Minister Malcolm Turnbull said the government stood with the Indonesian government "against this barbaric attack on peaceful religious gatherings".

Suicide bombers on motorcycles, believed to be a family of six including a woman with children, targeted Sunday Mass congregations in three churches in Surabaya, Indonesia's second largest city.

In the statement the prime minister and Foreign Affairs Minister Julie Bishop also condemned recent attacks at the Indonesian Police Mobile Brigade Headquarters in which six officers lost their lives.

Mr Turnbull and Ms Bishop offered their condolences to the family and friends of those killed and injured.

They assured the Indonesian nation that Australia shared their commitment to mutual respect and rejected "those who sought to spread division and hatred".