Turnbull condemns Turkey, Egypt attacks

Prime Minister Malcolm Turnbull has condemned terrorist attacks in Cairo and Istanbul, declaring Australia stands with its allies in the fight against extremism.

At least 25 people were killed and 49 wounded in a bombing at Cairo's largest Coptic cathedral, many of them women and children attending Sunday mass.

Meanwhile, 38 were killed and 155 wounded in a bomb attack outside a football stadium in Istanbul.

"We stand shoulder to shoulder with our friends, with our allies, around the world, in the fight against extremism," Mr Turnbull told reporters in Sydney on Monday.

"These crimes are despicable, they are cowardly, and the Australian government - and I know the Australian people - condemns them."

Opposition Leader Bill Shorten said Labor expressed its deepest sympathy to the Turkish people following Saturday's "barbarous" attack.